HP LaserJet 4V Series Printers (and Older) - Printer Control Panel Display Status and Error Messages

Error message			Printer	Description/action required
FC No Font			HP LaserJet IIISi series printer	The printer could not read the font cartridge.  Re-insert the cartridge and press Continue or Online to resume operation. If the error persists, replace the font cartridge.
FC (top, bottom, both left, right)			All	The font cartridge was removed while the printer was offline and contained buffered print data. Re-insert font cartridge(s) and press Continue.
FE Cartridge  FE Font Cart Err			All	The font cartridge was removed or installed while the printer was online. Turn the printer off and back on to clear the message.
FI Insert Cart  FI Insert Top  FI Insert Btm			HP LaserJet 4, 4M, 4Plus, 4Mplus 4P,4Si series printers	An accessory cartridge was removed while the printer was in an error state. Insert the accessory cartridge and clear any pending error conditions before removing the cartridge.
FR Remove Cart  FR Remove Top  FR Remove Btm			HP LaserJet 4, 4M, 4Plus, 4Mplus , 4Si, and 4P series printers	An accessory cartridge was inserted while the printer was in an error state. Remove the accessory cartridge and clear any pending error condition before inserting the cartridge.
Blank LCD			HP LaserJet SII, IIP, IIP Plus, IID, III, IIID, IIIP, IIISi, 4, 4M, 4Plus, 4Mplus, 4P, 4MP, 4Si, 4Si MX series printers	Printer cannot generate sufficient voltage levels to activate the display panel or the display panel and/or related circuitry is defective. Verify AC power supply and cord are OK. Turn the printer off, wait 10 to 15 minutes, then turn it back on. If the display remains blank, service is required.
Blank LED			HP LaserJet, Plus, and 500 Plus series printers	Printer cannot generate sufficient voltage levels to activate the display panel or the display panel and/or its related circuitry is defective. Verify AC power supply and cord are OK.
Config Lang			HP LaserJet IIP, IIP+, IID, III, IIIP, IIID, and IIISi, 4, 4Mplus, 4P, 4MP series printers	The printer was turned on while holding down the ENTER key. This allows the operator to select a local language for display. See Language below.
Language=XX			HP LaserJet IIP, IIP+, IID, III, IIIP, IIID, IIISi series printers	This status message will default to Language = English . Press the + (plus) or - (minus) key to select one of six languages. Press ENTER key once, then put printer back online.
MF Ready			HP LaserJet IIP, IIP+, IIIP series printer	The printer is displaying a status message indicating the front panel selection of manual feed being turned on. Insert paper into the multi-purpose tray to continue.
MF Feed [paper size]			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	The printer requested that media be manually fed. Paper size may be: Letter, Legal, Exec, or A4. Insert the appropriate media size into the MP tray (Manual feed guides on HP LaserJet 4Si Printer) and press online to print or press Continue to feed from the Paper Cassette. On the HP LaserJet 4P series printer insert the appropriate media into the manual feed slot and it will automatically pull the paper.
ME Feed envelope			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	The printer requested that an envelope be manually fed. Envelope size may be: COM 10, Monarch, DL, C5, B5, or Envelope. Insert the appropriate envelope size into the MP tray (Manual feed guides on HP LaserJet 4Si series printer) and press online to print. On the HP LaserJet 4P series printer insert the appropriate media in the manual feed slot and it will automatically pull the paper.
MP Load  LC Load  LE Load			HP LaserJet IIP, IIP+, IIIP series printers	This message appears when the multi-purpose tray, the lower cassette or lower envelope tray are empty and have been chosen by the front panel as the selected paper tray. Load correct paper size and put the printer back online. Verify MP (Multi-Purpose) and LE (Lower Envelope) sizes are properly set.
MPLoad  PCLoad  LCLoad [paper size]			HP LaserJet 4, 4M, 4Plus, 4Mplus series printers	The printer received a request for a paper or envelope size not available in the printer (or the tray is empty). The MP=Multi-Purpose, PC=Paper Cassette and LC =Lower Cassette. Paper size may be Letter, Legal, Exec, OR A4; for MP Tray, envelope may be COM10, Monarch, DL, C5, or B5. Load the correct paper tray and/or media or press continue to use the media in the installed tray.
				The printer received a request for a paper size not available in the printer or the paper cassette is empty. PC =Paper Cassette. Paper size may be Letter, Legal, Exec, or A4. Load the correct paper size in tray or press continue to use the media in the installed tray.
			HP LaserJet 4Si, 4Si MX series printers	The printer received a request for a paper size not available in the printer or both paper trays are empty. The UC=Upper Cassette and LC =Lower Cassette. Paper size may be Letter, Legal, Exec or A4. Load the correct paper size in tray or press Continue to use the media in the installed tray.
Error message			Printer	Description/action required
EE Load COM10  EE Load Monarch  EE Load DL  EE Load C5 EE Load B5  EE Load Envelope			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX series printers	The printer received a request for an envelope size that is not currently loaded in the optional envelope feeder or the feeder is empty. Load the correct envelope size into the feeder, or press Continueto use the size of media installed in the feeder.
MP Empty  LC Empty  LE Empty			HP LaserJet IIP, IIP+, IIIP series printers	This message appears when the multi-purpose tray, the lower cassette, or lower envelope tray is empty and is not the selected paper tray. Because the message refers to a non-selected paper tray, it does not require the tray to be filled for the printer to function. It is merely a reminder that the tray is empty.
PC Tray Empty  LC Tray Empty			HP LaserJet 4Plus, 4MPLus series printers	Add paper to empty tray. PC=Paper Cassette, LC=Lower Cassette.
PC-65			HP LaserJet, Plus, 500 Plus series printers	This is not a PC message. It is a PC B5 message. The printer is asking for the same paper length (size) that was requested by the software.
PC Install			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4V, 4MV series printers	Lower Cassette is selected as the paper source. The printer has detected that the Paper Cassette, which serves as a paper guide for the Lower Cassette, is not installed. Install (or reseat) Paper Cassette.
User maintenance			HP LaserJet IIISi, 4Si, 4Si MX series printers	This message appears after 200,000 pages have been run through the printer. It is a User Maintenance message indicating that certain parts should be replaced in the printer (or maintenance should be performed). These parts are purchased via the Printer Maintenance Kit (part number C2062A) and can be obtained by contacting either an HP Authorized Dealer or the Support Materials Organization.  The parts included in this kit are as follows: Fusing Assembly Transfer Roller Transfer Roller Clip Pick-Up and Separation Rollers Duplex Pick-Up Roller (If installed) These are User Replaceable parts. The directions for completing this maintenance come with the Printer Maintenance Kit and can also be found in the User's Manual (HP LaserJet IIISi series printer) or Operator's Guide (HP LaserJet 4Si series printer). This message will appear again after every 200,000 copies and user maintenance is recommended at this point. The message will be displayed on the control panel until it is cleared. The message is cleared by changing Service Msg=Off in the Config menu on the HP LaserJet IIISi series printer or changing User Maintenance=Off in the Config menu on the HP LaserJet 4Si series printer. Clearing the message will reset the internal maintenance page counter (not the same as page count listed on self-test) to zero.
Switching To			HP LaserJet IIISi series printer	This message indicates the printer's language is in the process of being changed from PCL to PostScript or from PostScript to PCL.
PCL Print Menu			HP LaserJet IIISi series printer	In PCL mode, this message appears for one second before the PCL Printing Menu appears when the Menu key is pressed once.
PCL Config			HP LaserJet IIISi series printer	In PCL mode, this message appears for one second before the PCL Configuration Menu appears when the Menu key is pressed and held for about five seconds.
00 PCL Ready			HP LaserJet IIISi series printer	Printer is ready to use in PCL mode. An * indicates that Sys Switch = Off .
00 PS Ready			HP LaserJet IIISi series printer	Printer is ready to use in PostScript mode. An * indicates that Sys Switch = Off .
02 Warming Up			All	Wait until printer signals ready. Prolonged display of this message indicates a defective interface cable or poor interface connection. Turn printer off, and then back on. If message clears, the printer is OK and there may be a problem associated with the computer side of the system.
04 Self-Test			HP LaserJet II, IID, IIP, IIP+,III, IIID, IIIP, IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4P, 4MP series printers	Printing continuous self-test. This self-test will empty the paper tray until the printer is turned off or put back online. If the printer is put back online to clear the 04 Self-Test , an additional one to three sheets may be printed until the test is complete.
05 Self-Test			HP LaserJet II, IID, IIP, IIP+,III, IIID, IIIP, IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4P, 4MP, 500 series printers	Self-Test is in progress. If the printer "sticks" on 05 self-test , turn the printer off and back on. If the message persists, consult service.
06 Config Page  06 PS Config Page			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si Mx, 4P, 4MP series printers	Printing a PCL configuration Page. No action required.
Error message			Printer	Description/action required
06 Demo Page			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	Printing a PCL Demonstration Page or PostScript Demonstration Page. No action required.
06 Printing Test			HP LaserJet II, IID, IIP, IIP+, III, IIID, IIIP, IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	Self-test is printing a single output sheet titled "Self-Test."
06 Font Printout			HP LaserJet II, IID, IIP, IIP+ III, IIID, IIIP, IIISi series printers	Printing sample characters from available downloaded permanent soft fonts, internal fonts and installed cartridge fonts along with their respective escape characters. NOTE: Series II font printout does not show escape sequence characters.
06 Typeface List			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	Printing a list of the typefaces resident in the printer.
07 Reset			All (Except 2686A)	Returns all printing menu items to selected settings and clears buffer pages, temporary soft fonts and temporary macros.
08 Cold Reset			HP LaserJet II, IID, IIP, IIP+ III, IIID, IIIP, IIISi series printers	Returns all configuration and printing menu selections to the factory default settings. This is performed by holding down the online key while turning the printer on. The purpose is a "last resort" effort to clear the printer of any suspected glitches. It is advisable to run a 05 Self-Test before the reset to retain a hard copy of all the current printer settings.
08 Cold Reset			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP Printers	HP LaserJet 4 series printer - this reset returns all Printing, PCL, Job, Config, Parallel, Serial, Aux I/O (if installed), and installed personality menu settings to factory default configuration. The exceptions are page count, MP tray size, envelope feeder size and display Language.  HP LaserJet 4Si series printer - this reset returns all Printing, PCL, Job, Config, Parallel, MIO (if installed), and installed personality menu settings to factory default configuration. The exceptions are page count and display Language.  HP LaserJet 4P series printer - this reset returns all Printing, PCL, Job, Config, Parallel, Serial and installed personality menu settings to factory default configuration. The exceptions are page count and display language. This reset may need to be done when an MIO card is installed. Use with caution; always do a self-test before the cold reset to maintain a record of the printer's current settings. In a shared environment, this reset should only be performed by the system administrator. To do a cold reset, hold down the[online] key while switching the printer on until 08 Cold Resetappears in the printer's display.
68 Cold Reset			HP LaserJet IIISi series printers	The printer's non-volatile memory is new, or the battery is dead. The printer returns all Printing and Configuration menu selections to factory default. If the printer is set up as a PostScript printer, the68 reset will return it to PCL status. If the message always appears when the printer is turned on, the printer will still operate, but it should be serviced to correct the problem.
09 Menu Reset			HP LaserJet II, IID,IIP, IIP+, IID, III, IIID, IIIP, IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4P, 4MP series printers	The printer clears all buffered pages, temporary soft fonts and temporary macros. (This reset returns all Printing Menu settings back to the factory default settings.)
09 Reset All I/O			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP Printers	Clearing the page buffer, removing all perishable personality data such as temporary typefaces, and clearing the input and output buffer for all I/Os.
09 Rst Active I/O			HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	Clearing the page buffer, removing all perishable personality data such as temporary typefaces, and clearing the input and output buffer for the active I/O only.
10 Reset To Save			HP LaserJet IID, IIP, IIP+, III, IIID, IIIP, IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	Changes in the menu were made with data present in the print buffer. Press and hold [Continue/Reset] until 07 Reset appears to confirm the selections (temporary macros and temporary fonts will be deleted) or, press [Continue/Reset] or [Online] (no changes to any menu selections will be made.)
				The Printing, PCL, Job, Config, and installed personality (PS, etc.) menus were changed while data, temporary fonts, or temporary macros were present in printer memory, or while the printer was in the middle of a job. Press Continue or Online and the changes will remain recorded in the menu (marked with an *), but will not become active until the printer is reset or the job boundary is detected. If the printer is reset (press Reset ) to immediately activate the selection, temporary macros, temporary fonts, and buffered data will be deleted.
11 Paper Out			HP LaserJet, Plus, 500 Plus, II series printers	Paper tray is empty. If there is paper in the tray and the printer still displays 11, verify the tray is all the way in. If the message persists, consult service.
12 Printer Open			HP LaserJet II, IID, III, IIID, IIISI, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX series printers	The printer's top cover is not correctly closed, or the toner cartridge is not correctly installed. Verify the toner cartridge is fully seated and close the printer firmly. Plugging a 220V model printer into a 120V power source can also result in this message. If this message persists, a repair may be required.
12 Printer Open Or No EP			HP LaserJet IIP, IIP Plus, IIIP, 4P, 4MP series printers	The printer is not closed properly, the print cartridge is missing, broken, or defective, or the cooling fan is not working. Plugging a 220V model printer into a 120V power source can also result in this message. Ensure the printer is firmly closed. If the message persists, consult service.
Error message			Printer	Description/action required
13 Paper Jam			HP LaserJet II, IIP, IIIP, IID, IIP+, IIID series printers	Remove jammed paper. The top must be opened and closed (the front on the HP LaserJet IIP, IIP+, IIIP series printers) to clear the message. Double check the duplexing paper path on the HP LaserJet IID and IIID series printers (left side door). If the message persists, there may be a malfunctioning paper path sensor and service would be needed.
13.X Paper Jam  X = 1 internal  X = 2 input  x = 3 duplex  X = 4 output			HP LaserJet IIISi, 4Si, 4Si MX series printers	Paper is jammed somewhere along the paper path. The value that follows the "13" in the message window will indicate in which part of the paper path the paper is jammed. Also, the paper jam sensor at the rear of the fusing assembly may have become stuck. Check the optional duplexing paper path if the duplexer has been installed.
13 Paper Jam			HP LaserJet IID, IIID series printers	Paper jams can occur in these printers when using the "automatic manual feed" as opposed to explicitly putting the printer in manual feed mode. The use of "automatic manual feed" is not a supported feature, nor is it a suggested procedure. This procedure is known to cause problems, particularly when using the lower cassette as the manual feed slot because it is more difficult to align the paper properly when it is pulled in from the lower input slot. Paper is the only print media that should be fed from the lower input slot and other types of media may not only cause jamming, but also permanent printer damage.
13 Paper Jam			HP LaserJet 4, 4M, 4Plus, 4Mplus series printers	Paper is jammed in the paper path or the paper jam sensor at the rear of the fusing assembly may be stuck, causing a false paper jam warning. Remove jammed paper. While clearing paper jams the top cover or rear cover must be opened and closed again before pressingContinue or online to resume. Check that the rear cover is closed; an open rear cover may cause a paper jam. If no paper jam is found, check locations shown in the user's manual.
			HP LaserJet 4P, 4MP series printers	Paper is jammed in the top or rear of the printer. Clear jam and press Continue or Online to resume printing. To prevent further jams, verify the rear door is closed securely. A false paper jam message will occur if the printer's back door is open. If message persists, the printer could have a defective paper jam sensor and service would be required.
14 No EP Cart 14 No Toner Cart			HP LaserJet II, IID, III, IIID, IIISi, 4, 4M, 4Plus, 4Mplus series printers	There is no toner cartridge in the printer, or this message indicates the possibility of a broken or damaged toner cartridge. Turn the printer off and back on. If the message returns replace toner cartridge. After replacing cartridge if the message still occurs consult service.
15 Engine Test			Not all printers have this option.	Engine Test with a single sheet of vertical line printout also known as a "skewing" test.
16 Toner Low			HP LaserJet II, IID, III, IIID, 4, 4M, 4Plus, 4Mplus series printers	Toner cartridge is low on toner. The message may also indicate the EP cartridge is not making good contact with the printer's internal circuitry. Shake and re-install the toner cartridge. Replace the toner cartridge. If the message persists, consult service. On the HP LaserJet 4, 4M, 4Plus and 4MPlus series printers if Toner Low=On (Config menu), this message will remain in the display until the toner cartridge is changed. If Toner Low=Off this message will disappear by pressing Continue .
16 Toner Low 1  16 Toner Low 2  16 Toner Low 3			HP LaserJet IIISi, 4Si, 4Si MX series printers	Toner Low 1 indicates the 8000 page toner cartridge is approximately 200 pages from depletion. Toner Low 2 and Toner Low 3 are indications of further depletion with Toner Low 3 indicating a nearly illegible page. Replace the toner cartridge.
17 Mem Config			HP LaserJet IIIP, III, IIID, IIISi series printers	A status message by the printer indicating it is re-configuring internal and expanded memory for page protection. If using an optional I/O board, the optional settings in the configuration menu may be lost. If this occurs after page protection is turned on, power cycle the printer (off and on) and reselect the optional I/O in the Configuration Menu. In some cases, it may be necessary to take the optional board out, set page protection on, then install the optional board.
18 Skip Self-test			HP LaserJet III, IIID, IIISi series printers	A Status message indicating that the "minus" key was held down while powering up the printer. If the printer is stuck in this mode, the minus key is probably stuck. Turn the printer off, choose the minus key, and turn the printer back on.
18 Aux I/O Init			HP LaserJet 4, 4M series printers	The modular I/O card is initializing. This message will automatically disappear after the card is initialized (in less than 60 seconds, depending on the card). No action required.
18 Aux I/O Nt Rdy			HP LaserJet 4, 4M series printers	The modular I/O (MIO) card is not ready. Refer to the MIO card's documentation. The printer will continue to display this message until the problem with the card is corrected or the card is removed. Always turn off and unplug the printer when removing I/0 cards. Pressing Continue will not clear the display.
18 MIO INIT			HP LaserJet 4Plus, 4Mplus series printers	The MIO card is initializing. This is a status message; during initialization the MIO is not active, since the printer supports I/O switching, the printer remains on line. No action required, display will clear automatically (this may take up to a minute, depending on the card).
18 MIO Not Ready			HP LaserJet 4Plus, 4Mplus series printers	The MIO card is not ready. The serial and Bi-Tronics parallel ports will continue to operate normally. SHIFT and Continue will not clear the display. To clear the display, switch the printer Off, remove the card, and switch the printer On. See MIO documentation for troubleshooting.
18 Upper MIO 18 Lower MIO			HP LaserJet 4Si series printer	The upper MIO card is initializing. During initialization the MIO is not active, but since the printer supports I/O switching, the printer remains on line and displays this status message. No action required. Display clears automatically (this can take up to a minute, depending upon the card.
Error message			Printer	Description/action required
19 Add Memory			HP LaserJet IIP, IIP Plus Printers	This message appears if the PCL 5 Cartridge is installed without adding optional memory.
20 Error			HP LaserJet II, IIP, IIP+, IID series printers	The printer received more data (soft fonts, macros or graphics) than it can fit into its internal memory. Press Continue to resume printing. Purchase additional printer memory or reduce the amount of data. Data can be reduced by using fewer soft fonts and macros, smaller graphics, and a lower resolution. A repair is not required.
	NOTE:	HP no longer offers added memory for HP LaserJet, HP LaserJet Plus, HP LaserJet 500 Plus, HP LaserJet Series II, or HP LaserJet IID series printers.

Error message			Printer	Description/action required
20 Mem Overflow			HP LaserJet IIIP, III, IIID, IIISI, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	The printer received more data from the computer than can fit in its available user memory. Too many macros or soft fonts, or graphics that were too complex may have been transferred. Press SHIFT and Continue to print the transferred data (data loss may result), then simplify the print job or install additional memory.
	NOTE:	Without additional memory, the HP LaserJet III series printers have some limitations when using large point sizes in scalable fonts. This limitation also depends on the number of scalable fonts per page and the font characteristics.

Error message	Printer	Description/action required
21 Error	HP LaserJet IIP, IIP+, II, IID series printers	The printer is unable to process very complex data fast enough for the print engine. Multiple addressing of single pixels, too many different fonts or characters in a document or too many cursor position addresses per document will cause this error. Press Continue to resume printing. Repair is not required. Workarounds: Reduce the document's complexity by using fewer fonts and removing bolding, shading, or underlining. Reduce the document's graphics resolution.
21 Print Overrun	HP LaserJet IIIP, III, IIID, IIISI, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	Complex data (rules, graphics, dense text) have caused the printer's page formatting process to "fall behind" the printing process. For the HP LaserJet 4 series printers this problem is also caused by printing too many typefaces at 600 dpi, or by printing a PostScript job at 600 dpi using only the printers base memory. Workarounds: Reduce the document's complexity by using fewer fonts and removing bolding, shading, or underlining. Reduce the document's graphics resolution. Select the printer's Page Protect option (Letter, A4, Legal). The following amounts of optional printer memory are required to use the "Page Protect" feature: HP LaserJet III series printers require 2 MB to use page protect at Letter, A4 or Legal sizes. HP LaserJet 4 series printers Paper Size 300 dpi 600 dpi LTR/A4 2 MB 6 MB LGL 3 MB 6 MB
22 Error 22  I/O CNFIG ERROR	HP LaserJet IIP, IIP+, II, IID, III, IIID, IIISI, IIIP series printers	Serial buffer overflow error. The host computer did not receive, or ignored, the printer's request to suspend the flow of data causing the printer's buffer to overflow. Press Continue to clear the error message. Verify that the proper printer cable is being used and that both ends of the cable are tightly connected. If the error appears on the printer at bootup, check to see if the printers serial cable is plugged into the computer's parallel port. If running parallel, the cause could be a bad cable or printer interface. If the error appears only after data is sent, there may be incompatible handshaking protocol; for example, XON/XOFF, or DTR. By default, the printer lowers the DTR polarity and sends XOFF (DC3) to suspend the flow of data. DTR is raised and XON (DC1) sent to resume the flow.
22 Error	HP LaserJet 4, 4M, 4P, 4MP series printers	The Serial or Parallel (bi-tronics) interface is improperly configured or there is a communication issue. Press Continue to clear the error. Some data may be lost. If on a network contact the network administrator. There may be a problem with the network interface. If the error continues after troubleshooting contact an authorized HP dealer or Service representative. Parallel Communication Defective parallel cable or cable that is over the supported 10 foot length. Verify the cable connections are secure at both ends. Disconnect and reconnect even if they look secure. Set High Speed to No and Advanced Functions to "OFF" in the Parallel Menu on the front panel of the printer. If using Novell network v. 3.11 and a version of PServer before 1.22. Upgrade to at least PServer v.1.22 and change the "Use Interrupts" setting in the Print Server Information section of the Novell PConsole utility to No. Serial Communication: Serial cable plugged into the parallel port on the PC (error 22 message will appear when the printer is turned on). Defective serial cable or cable that is over the supported length. Verify the cable connections are secure at both ends. Disconnect and reconnect even if they look secure. Not using correct hardware handshaking (XON/XOFF or DTR).
22 SER I/O Error  22 PAR I/O Error  22 MIO I/O Error	HP LaserJet 4Plus, 4Mplus series printers	SER=Serial interface, PAR=Parallel interface MIO=I/O card. For serial or parallel configuration, the computer and printer are not communicating because of improper signal protocols. Parallel Configuration: May mean a loose, cable connection, or a bad or poor quality cable. Set High Speed to No and Advanced Functions to OFF in the Parallel Menu on the front panel of the printer. Serial Configuration: Wrong pacing option may have been selected. The HP LaserJet series printer uses XON/XOFF and DTR/DSR signal protocols rather than ETX/ACK protocol. If an error 22 is encountered with the HP LaserJet 4 Plus series printer in a UNIX environment Robust XON/XOFF may need to be turned off. MIO Configuration: This is an I/O buffer overrun error. If using an I/O card other than the serial/Bi-Tronics Parallel I/O supplied with the printer, see the manual for that device or contact a local dealer. If on a network, contact the network administrator.
23 I/O NOT READY	HP LaserJet IIISi series printer	The I/O card is not able to accept data. Print a self-test for more information. If an optional I/O interface is installed, refer to that product's documentation or contact the vendor.
25 PCL MEM FULL  25 PS MEM FULL	HP LaserJet 4Si series printer	The PCL or PostScript personality memory environment area is full. To continue printing, press Continue ; however some data is lost. To prevent reoccurrence, reserve more memory for this environment area.
30 PS ERROR XX	HP LaserJet IIISi series printer	A PostScript-specific error has occurred. Refer to the User's Manual for a listing. Most of these messages are eliminated if AUTO CONT=ON. NOTE: When AUTO CONT=ON the printer will continue to receive, but not process, data until it receives a valid end of job command.
40 Error	All	Indicates a protocol error occurred during the transfer of data from the computer to the printer. This error can be caused by a loose or damaged cable, loss of power to the computer while the printer is online, or incompatible baud rate, parity, data bits, or stop bits settings. In addition, this error can occur on the HP LaserJet III or IIID series printer if the I/O is configured to serial and serial is set to RS-422 before a cable is attached to the serial I/O on the printer and/or the host system.
		For modular I/O (MIO) cards, this means there was an abnormal connection break. Press Continue to clear the error message. Ensure that the printer and computer are configured for the same baud rate; typically 9600. CAUTION: Do not power the computer on or off when the printer is powered on. If this problem persists, a repair may be required. If an optional I/O interface is installed, refer to that product's documentation or contact the vendor.
41 ERROR	HP LaserJet IIP series printer	For the HP LaserJet IIP series printer, this may indicate an issue with static build up on the on the fusing assembly. Turn the printer off, data loss will occur. If dense media is being used, decrease the number of pages loaded in the MP tray or lower cassette. Do not refill the tray until the printer display prompts for more paper. This error can also be caused by adding paper to the top of the MP tray while the printer is printing. If the error persists contact an authorized HP dealer or HP Service Technician.
41 ERROR	ALL	A temporary error occurred while printing. This error most commonly occurs when the printer picks two sheets of paper at once. Remove the page from the output tray and press Continue. The page containing the error is reprinted automatically.
41.1 Error  41.3 Error  41.4 Error  41.5. Error	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4P, 4MP series printers	A temporary error occurred while printing. This error most commonly occurs when: The printer picks two sheets of paper at once. Remove the page from the output tray and press Continue . The previous page is reprinted automatically. The wrong size media are loaded into a tray. Print a self-test to verify paper size settings for trays. With the HP LaserJet 4, 4M, 4Plus, 4MPlus series printers this error most commonly occurs when the paper size knob on the 250 or 500 sheet universal cassette does not match the installed paper, the wrong size media is loaded into the cassette. If the error persists, contact your dealer or HP Service Technician.
41.2 Error  51 Error	All	Indicates a Beam Detect error. If this error occurs, press the Continue key and the printer will repeat the page. If the printer cannot correct the error after two seconds, a Beam Detect 51 Error will occur. Replace the toner cartridge and retest the printer. If the printer was just moved from a cold to a warm environment condensation may have formed inside the printer. Allow the printer to stand for up to 6 hours, until any condensation has dissipated. If the problem persists repair service is required.
42 ERROR	HP LaserJet II, IID series printers	A communications issue has occurred between the printer and a card installed in the printer's optional interface slot. Press Continue to clear the error message. Make sure the card has been installed and configured correctly. If the problem persists, contact the vendor from whom the card was purchased.
42 Opt Interface	HP LaserJet III, IIID series printers	A communications issue has occurred between the printer and a card installed in the printer's optional interface slot. Press Continue to clear the error message. Make sure the card has been installed and configured correctly. If the problem persists, contact the vendor from whom the card was purchased.
Error message	Printer	Description/action required
43 ERROR	HP LaserJet II, IID series printers	A communications issue has occurred between the printer and a card installed in the printer's optional interface slot. Press Continue to clear the error message. Make sure the card has been installed and configured correctly. If the problem persists, contact the vendor from whom the card was purchased.
43 Opt Interface	HP LaserJet III, IIID series printers	A communications issue has occurred between the printer and a card installed in the printer's optional interface slot. Press Continue to clear the error message. Make sure the card has been installed and configured correctly. If the problem persists, contact the vendor from whom the card was purchased.
48 Invalid Job	HP LaserJet IIISi series printers	This message will be displayed when the wrong printer language (PCL5 or PostScript, for instance) is being used or a language other than PCL5 or Postscript is being used. By pressing Continue , the printer will continue to receive--but not process--data until a valid language switching sequence is received. The message will go away when a valid language switching sequence is received or a printer reset occurs. Check the software to ensure the correct language was selected.
49 Remove Page	HP LaserJet IIISi, 4Si series printers	A sheet of paper was in the manual feed guides when the printer powered on, or a paper tray with a sheet of paper in its manual feed guides was inserted while the printer was powering on. Remove the sheets or the tray until the power cycle is complete.
50 Service	All	A temporary error has occurred. For all Printers: Turn the printer off for 20 minutes to clear the temporary error. The power is low or unstable (For example: brownout). Locate and verify a stable power source. There is an internal service error. Indicates a possible malfunction in the fusing assembly or power supply. Turn printer off for at least 20 minutes (30 minutes for HP LaserJet IIISi or 4Si series printers) and restart. If this problem persists, call a dealer or HP Service Technician.
51 Error	All	The printer was unable to detect the laser beam. If the printer was just moved from a cold to warm environment, condensation may have formed inside the printer. Allow the printer to stand up to 6 hours, until any condensation has dissipated. The printer detected a temporary error. Press Continue to resume operation. If the error persists, contact a dealer or HP Service Technician.
51 Error	HP LaserJet, 6L, 5L, 6P, 5P, 4P, 4L series printers	A temporary error has occurred. Power cycle the printer. The laser scanner assembly is not seated. The laser scanner assembly is defective. Replace the laser scanner assembly ( or cable on the HP LaserJet 5L series printer only).
51 Error	HP LaserJet, 5, 4Plus,4 series printers	The laser scanner cable connectors are faulty. The laser scanner assembly is defective.
51 Error	HP LaserJet, 4V series printer	There is a problem with the fiber optic cable. The laser scanner assembly is defective.
51 Error	HP LaserJet, 4Si, IIISi series printers	The toner cartridge is defective. There is a problem with the fiber optic cable. The connectors are faulty. The DC voltage is poor. The laser scanner assembly is defective.
51 Error	HP LaserJet, IIIP, IIP Plus, IIP series printers	The toner cartridge is improperly seated. The laser shutter operation is functioning improperly. The fiber optic cable is damaged. The laser PCA is bad.
51 Error	HP LaserJet, IIID,III, IID, II series printers	The Toner cartridge is defective. There is a bad cable in the laser scanner to the DC controller. The fiber optic cable has cuts or kinks. The laser scanner assembly is defective.
51 Error	HP LaserJet, 2686D/A series printer	The laser or laser power setting is defective. The scanner is defective.
52 Error	All	A temporary error has occurred. Power cycle the printer. On some models pressing the Continuebutton on the control panel will resume operation. If the error persists, it could indicate an issue with the scanning assembly. Contact a dealer or HP Service Technician.
53 Error	HP LaserJet, Plus, 500 plus series printers	Indicates an internal service malfunction. Press Continue to resume operation. Some data loss may occur. If the error persists, consult service.
Error message	Printer	Description/action required
53 Error	HP LaserJet II, IID series printers	An error was detected on the optional memory board in the indicated slot. Verify that the correct revision level of memory is installed in the printer.
53 Error Unit 1	HP LaserJet IIP, IIP+, IIIP series printers	An error was detected on the optional memory board in the indicated slot. Verify that the correct revision level and memory part # has been installed in the printer. On the HP LaserJet IIP, IIP+, and IIIP series printers, Unit 1 and Unit 2 refer to the top and bottom slots, respectively.
58.3 Error	HP LaserJet 4MV series printer	Fan Motor Error. Fan Motor 3 (FM3) is defective. Switch the printer off and then back on. If the error continues: Check cabling between fan motor(s) and DC Controller PCA. Replace the faulty fan motor. Replace the DC Controller.
53-1 Error unit  53-2 Error unit	HP LaserJet III, IIID series printers	An error was detected on the optional memory board in the indicated slot. Verify that the correct revision level of memory is installed in the printer. On HP LaserJet III and HP LaserJet IIID series printers, 53-1 and 53-2 refer to the front (right) and rear (left) slots, respectively.
53 Service	HP LaserJet IIISi series printers	Indicates an internal service error. Turn the printer off for 10 minutes and turn back on. If the error persists, consult service.
53.XY.ZZ  Error 53	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	An error occurred during configuration and validation of SIMM memory. Verify the SIMM board is installed correctly. Pressing Continuewill clear this message, but the SIMM that caused the error will not be configured. If it is a memory SIMM with more than one bank of memory the good bank will be configured. Identify and replace the SIMM that caused the error. X = Hardware Type  0 = ROM 1 = RAM Y = Hardware Device  0 = Internal Memory 1 = SIMM slot 1 2 = SIMM slot 2 3 = SIMM slot 3 4 = SIMM slot 4 (HP LaserJet 4 and HP LaserJet 4Si series printers only) ZZ = Error Number  1 = Unsupported Memory 2 = Unrecognized Memory 3 = Failed RAM test 4 = Exceeded Max. RAM size  5 = Exceeded Max. ROM size 6 = Invalid SIMM speed 7 = SIMM reporting info incorrectly 8 = SIMM RAM parity error 9 = SIMM ROM needs mapped to an unsupported address 10 = SIMM address conflict 11 = SIMM ROM located in illegal address range (HP LaserJet 4Si series printers only) 12 = SIMM is too large for available memory (HP LaserJet 4Si series printers only).
54 Error	HP LaserJet, Plus, 500 Plus, II series printers	This message indicates a main motor overload. The most common cause is a paper tray that is too full or simultaneous paper feeds due to paper friction or static "cling". Check paper tray for overfull condition. Remove excess paper and press Continue .  If the error persists, consult service.
54 Error	HP LaserJet IID, IIID series printers	The guide used to align paper when printing in duplex mode has not been properly positioned. If powering the printer Off, then On does not resolve the issue, repair service is required.
54 Error	HP LaserJet IIP, IIP Plus, III, IIIP, IIISi series printers	Indicates an internal service error. Turn the printer off for 10 minutes, then turn it back on. If the error persists, consult service.
54 Service	HP LaserJet IIISi, 4Si series printers	The guide used to align paper when printing in duplex mode has not been properly positioned. If powering the printer Off, then On does not resolve the issue; repair service is required.
55 Error 55 Service	All	The printer failed to properly initialize when powered on. Indicates an internal service error. Turn the printer off for 10 minutes and turn back on. If the message persists, consult service.
56 Error	HP LaserJet IID, IIID, IIISI, 4SI, 4Si MX series printers	A duplex job was sent to the printer with the rear output selector knob in the wrong (11 o'clock) position. Adjust the output knob to the correct (9 o'clock) position and pressContinue to resume operation.  The HP LaserJet IIISI, 4SI,and 4Si MX series printers will display this message if the optional envelope feeder is selected while duplex is enabled. Either disable duplex or remove the envelope feeder.
57 Service  57.1 Service 57.2 Service 57.3 Service 57.4 Service	HP LaserJet IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	The printer has identified an internal service error. Turn the printer off and then back on. If the message persists, consult service.
57 Error Unit X  57-1 Error unit  57-2 Error unit	HP LaserJet IIP, IIP Plus, III, IIID, IIIP series printers	The optional memory card in the indicated slot cannot be configured because the printer's memory expansion limits have been exceeded. On the HP LaserJet IIP and IIIP series printers, Unit 1 and Unit 2 refer to the top and bottom slots respectively. On HP LaserJet III and IIID series printer's, 57-1 and 57-2 refer to the front (right) and rear (left) slots, respectively. Four megabytes (4 MB) is the maximum amount of expansion memory these printers can recognize. Remove any expansion memory in excess of 4 MB.
58 Service	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4P, 4MP Printers, 4V, 4MV series printers	The printer has detected an exhaust fan failure. Switch the printer off and back on. If the message reappears, repair service is required.
58.1 Error  58.2 Error	HP LaserJet 4Si series printer	As referred to on Page 7-8 of the User’s Manual , the lifter mechanism of the paper tray has failed (X: 1 = Upper Tray, 2 = Lower Tray). Press Continue to have the printer print from the other tray. Turn the printer off, then on again. If the error message appears again, contact an authorized service agent.
59 Add Mem	HP LaserJet IIISi series printer	There is not enough memory for the PostScript job to execute. Switch the printer off and add more memory or reduce the job size. In addition, check for the correct placement of 4 MB and 8 MB SIMM boards. These boards must be placed on the bottom of the memory stack. See Error 60.1, 2, 3, 4.
	HP LaserJet 4Si, 4Si MX series printers	The PostScript option is installed without enough memory to support the application. The PostScript option requires a minimum of 4 MB for proper operation.
Error message	Printer	Description/action required
60 Error	HP LaserJet, Plus, 500 Plus series printers	The printer's Interface board has detected an internal error. Check for an improperly seated font cartridge or data cable. Turn printer off and back on. If the message persists, consult service.
60.1 Error  60.2 Error  60.3 Error  60.4 Error	HP LaserJet IIISi series printers	An expansion memory card (SIMM) has been installed incorrectly (out of sequence) into the slot indicated by the error code. The printer will still be able to print, but will only be able to use the memory below the faulty card. Four megabyte cards go in first from bottom slot up, then one megabyte cards. Turn the printer off and reorganize the memory cards into their correct slots. See page G-7 of the User's Manual .
61.1 Error  61.2 Error  61.3 Error  61.4 Error	HP LaserJet IIISi series printer	A SIMM that is the wrong size or speed is installed. The HP LaserJet IIISI series printer supports 1, 4, and 8 MB, 36 -bit SIMMs rated at 80 NS. Check that installed memory meets these specifications. Press Continue to temporarily clear this error. The printer will still print, but will only be able to use the memory installed below the SIMM in question. See pages G-2 and G-14 of the User's Manual
61.1 Error  61.2 Error  61.3 Error  61.4 Error	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	The printer encountered a parity error when accessing the RAM memory SIMM in slot "X". If X=0, the slot with the defective SIMM could not be determined. Switch the printer off and then back on. (Data stored in printer will be lost.) If the error is still present, first switch the printer off and verify that the SIMM board is installed correctly. Switch the printer on. If the error is still present, switch the printer off and remove the SIMM board If the error message does not appear, the problem is on the SIMM. If the message still appears, the problem is in the printer's internal memory and requires service.
62.1 Error  62.2 Error  62.3 Error  62.4 Error  62.5 Error  62.6 Error	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX series printers	The printer identified a problem while checking its memory. "X" refers to the device the printer was checking when it encountered the error. 0 = Internal memory 1-4 = SIMM slot 5 = font cartridge (upper on HP LaserJet 4Si series printer) 6 = lower cartridge (HP LaserJet 4Si series printer only) 6 = Cache (HP LaserJet 4Plus, 4MPLus series printers)  If the printer contains a SIMM memory board or a typeface cartridge, switch off the printer. (Data stored in the printer will be lost.) Verify that the SIMM board or typeface cartridge is installed correctly and switch the printer back on. If the error is still present, switch off the printer and remove the SIMM board or type cartridge. Switch the printer back on. If the error message does not appear, the problem is on the SIMM board or typeface cartridge.
	HP LaserJet 4P, 4MP series printers	The Printer encountered a parity error when accessing the RAM memory SIMM in slot "X". If X=0, the faulty SIMM slot could not be determined. 0 = Internal Memory 1-3 = SIMM Slot 4 = Cartridge
63 Service  63.5 Service 63 Needs Service	HP LaserJet series printers	The printer identified a problem while checking its internal RAM. Remove any expanded memory boards and reboot printer. If message persists, consult service. If message clears, then the problem exists with the expanded memory.
63.1 Error  63.2 Error  63.3 Error  63.4 Error	HP LaserJet IIISi series printer	Indicates a possible faulty expansion SIMM. The printer will still print, but will only be able to use the expansion memory below the faulty SIMM. Turn the printer off and verify the SIMM is installed correctly and turn the printer back on. If the error continues, turn the printer off and remove the SIMM. If the message clears, the problem is on the SIMM. If the message appears, consult service (for example, the problem is in the base printer memory or SIMM socket.)
64 Service	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4P, 4MP series printers	The printer identified an internal service error. Switch the printer Off, then back On. If the error appears again, repair service is required.
68 Cold Reset	HP LaserJet IIISi printers	The printer identified an internal service error. Switch the printer Off, then back On. If the error appears again, repair service is required.
68 Error	HP LaserJet IIP, IIP+, III, IIID, IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	This is a recoverable NVRAM (non volatile random access memory) error. Press Continue to clear the error. Check the Front Panel settings to see if any were set back to factory default settings. If error persists service is required.
68 Service	All	The printer has detected a non-volatile RAM failure. The printer can be operated until service repairs are made. All control panel settings return to factory default and the OO Ready message will read 68 Ready/Service until serviced.
69 Service	HP LaserJet II, IID, III, IIID series printers	Indicates an optional I/O interface error. The printer has found a problem on the optional interface card. Turn the printer off and verify the optional interface card is installed correctly. Turn printer on and verify the optional interface card is configured correctly. If error persists, contact the I/O card manufacturer or consult service.
70 Error	HP LaserJet II, IID, IIP, IIP Plus, II, IIID, IIIP, 4Si series printers	Indicates an incompatibility between the printer and the installed font cartridge. Turn the printer off and then back on. If message persists, verify with the cartridge manufacturer the installed cartridge was designed for use with that model printer.
71 Error	HP LaserJet II, IID, IIP, IIP Plus, IIID, IIIP series printers	Indicates an incompatibility between the printer and the installed font cartridge. Turn the printer off and then back on. If message persists, verify with the cartridge manufacturer the installed cartridge was designed for use with that model printer.
	HP LaserJet IIISi, 4Si series printers	An attempt was made to use a "personality" firmware cartridge. Personality cartridges are not supported on the HP LaserJet IIISi or HP LaserJet 4Si series printers.
72 Service	LaserJet II, IID, IIP, IIP+, III, IIID, IIIP series printers	A font cartridge was removed from the printer too quickly after it was inserted, the font cartridge is bad, or the connectors in the printer's cartridge slot have been damaged. Power the printer Off, re-insert the cartridge, then power the printer On. If the problem persists, the cartridge or the printer may need repair.
72 Service	HP LaserJet IIISi, 4Si, 4Si MX Printers	A font cartridge was removed while the printer was trying to access it. This causes a misread by the printer and generates the error code. Turn the printer off and back on to resume operation.
79 Service XXXX	HP LaserJet II, IID, IIP, IIP Plus, IIIP, IIID, IIISi, 4, 4M, 4Plus, 4Mplus, 4Si, 4Si MX, 4P, 4MP series printers	Indicates an unexpected firmware error was encountered. Document the error message. The numeric code displayed indicates a specific error for service personnel. Error 79 can also be caused by incorrect memory addressing to a font cartridge or memory card. Remove any installed font or personality cartridges (or memory expansion cards). Turn the printer back on. If the message persists, consult service. This error can also be software related. Ensure that the error is occurring consistently before servicing the printer. A defective print cartridge can also cause this problem (HP LaserJet 4Plus series printer only).
79 01bb	HP LaserJet IIP Plus series printer	Incompatibilities between the printer and software. Check memory indicated in the software and verify it is what is in the printer.
Error message	Printer	Description/action required
80 Service XXXX	HP LaserJet IIISi, 4, 4M, 4Plus, 4MPLus, 4Si series printers	A modular I/O interface error has occurred. Document the error code, the numbers displayed indicate a specific error for service personnel. Upgrading the MIO firmware may help resolve this error. For more information and troubleshooting steps, refer to HP Jetdirect Print Servers - 80, 81, 82, 86, and 87 Service Errors, General Troubleshooting  Turn the printer off and back on. If the error persists, consult service.
81 Service XXXX	HP LaserJet 4, 4M, 4Plus, 4Mplus printers	The printer detected a problem with an internal controller. The numbers following the message indicate the specific type of error. Press SHIFT and Continue to acknowledge the error. The printer will operate normally.  Upgrading the MIO firmware may help resolve this error. For more information and troubleshooting steps, refer to HP Jetdirect Print Servers - 80, 81, 82, 86, and 87 Service Errors, General Troubleshooting  Contact your dealer or HP Service representative regarding the occurrence of this error.
89 Service	HP LaserJet IIISi series printer	A PostScript internal controller error occurred. Document the error message. Turn the printer off and back on. If message persists, consult service.
Clearable Warning Messages	HP LaserJet 4, 4M, 4SI, 4Si MX, 4P, 4MP series printers	A "clearable warning" appears when the printer receives a print command that requires an option to be installed (such as additional memory or a PostScript SIMM). Depending on the situation, the printer will automatically reduce resolution, lower the level of page protection, compress the data, or abort the print job. The printer first attempts to satisfy the print request by reducing resolution, then by lowering the level of page protection, then by compressing the data if possible. If it receives a job for an uninstalled personality (such as PostScript) or requires more memory than is available, the job is aborted. Clear message by pressing SHIFT and Continue on the printer.
W1 Image Adapt	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4P series printers	The printer received a graphics print file that was too complex to print at the requested resolution. The printer automatically processes the file in the highest resolution possible with the memory installed. Add additional memory to print the file at full resolution. Check the printout for loss of data or print quality. Clear message by pressing SHIFT and Continue on the printer.
W2 Invalid Pers	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4P, 4MP series printers	The job was not printed because the requested personality, such as PostScript (MP), was not installed. Install the language in which the files are sent, together with enough memory to support that language. Clear message by pressing SHIFT and Continue on the printer.
W3 Job Aborted	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4P , 4MP series printers	The printer was forced to abort the print job because there was not enough memory to support the printer language used. Add more memory. Clear message by pressing SHIFT and Continueon the printer.
W4 Job 300/Off	HP LaserJet 4, 4M, 4Si, 4P series printers	The job was printed at 300 dpi with page protection off. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
W4 Job 300/Off	HP LaserJet 4, 4M, 4Plus, 4Mplus, 4Si, 4P series printers	The job was printed at 300 dpi with page protection off. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
W5 Job 300/Ltr	HP LaserJet 4, 4M, 4Si, 4P series printers	The job was printed at 300 dpi with page protection set to letter. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
W6 Job 300/A4	HP LaserJet 4, 4M, 4Si, 4P series printers	The job was printed at 300 dpi with page protection set to A4. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
W7 Job 300/Lgl	HP LaserJet 4, 4M, 4Si, 4P series printers	The job was printed at 300 dpi with page protection set to legal. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
W8 Job 600/Off	HP LaserJet 4, 4M, 4Si, 4P series printer	The job was printed at 600 dpi with page protection off. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
W9 Job 600/Ltr	HP LaserJet 4, 4M, 4Si, 4P series printers	The job was printed at 600 dpi with page protection set to letter. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
W0 Job 600/A4	HP LaserJet 4, 4M, 4Si, 4P series printers	The job was printed at 600 dpi with page protection set to A4. To print the job as requested, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
WM Job 300	HP LaserJet 4, 4M, 4Plus, 4Mplus series printers	The job was printed at 300 dpi. NOTE: If this message occurs frequently, install additional memory. Clear message by pressing SHIFT and Continue on the printer.
WM Mem Cnfig N/A	HP LaserJet 4Plus, 4Mplus, 4Si, 4Si MX series printers	The printer did not have enough memory when switched on to support the previous settings for I/O buffering and/or Resource Saving, probably because a memory SIMM was removed or a new personality SIMM was added. Due to these configuration changes, resource saving or I/O buffering is no longer available. If these options are desired, print a Self-Test page. Check the configuration settings, then reconfigure them. To reflect any changes made to the printer.  This message can also occur if the optional duplex unit has been added to the HP LaserJet 4Plus, 4Mplus series printer.
WM Chk Mem Cnfig	HP LaserJet 4Plus, 4Mplus series printers	I/O buffering and/or Resource Saving settings were altered when the printer was switched on because the printer did not have enough memory. This usually occurs after memory has been removed from the printer. (Check settings by printing a self-test.)
Wm Check Mem Mgt	HP LaserJet 4Si, 4Si MX series printers	There is still sufficient memory to accommodate resource saving, but the current setting cannot be satisfied by the available memory. Reconfigure the resource saving for the current personality.
WM [personality] Mem Full	HP LaserJet 4Plus, 4Mplus series printers	The Resource saving memory area for the specified personality is full. Press SHIFT and Continue to continue printing (some data will be lost). The current job will print, but some resources (downloaded fonts, etc.) may not be saved. If this error occurs frequently, adjust Resource Saving settings.