1. Hold down the Menu+ and Value+ keys while powering on the printer. Hold the keys down until SERVICE MODE is displayed.
2. The interrupted power-on self test is resumed. If the test completes successfully, the message SERVICE MODE is displayed.
3. To exit service mode, press the Go button.
HP Laserjet 5 series service mode
3.0 PAPER JAM HP Laserjet Error Codes
This A non-specific paper jam occurred.
solution
1. Remove jammed media from the specified location. 2. Verify the paper tray is fully closed. 3. Inspect and/or replace the feed and separation rollers. 4. Ensure there is no obstruction in the path, such as a torn piece of paper. 5. Open and close the top cover to clear the message. 6. Check sensors and flags for proper operation.
HP Laserjet Error Code 13.XX PAPER JAM
Media is jammed at the specified location (and possibly at other locations). If the message persists after all jams have been cleared, a sensor or sensor lever might be stuck or broken.
Fix
For all jam messages, do the following:
1. Remove jammed print media from the specified location. Check the entire paper path for other pieces of media in the path.
2. Open and close the top cover to clear the message.
3. Check sensors and flags in the paper path for proper operation.
HP Laserjet 5000 series service mode
Guide for HP Laserjet 5000 series service mode
1. Hold down [Select] and [Cancel Job] while turning on the printer.
(If the control panel reads INITIALIZING, the keys were released too soon.)
2. Press the right side of the [Menu] key, then press [Select]. The message SERVICE MODE is displayed.
3. Press [Menus] once to display SERVICE MENU.
4. Once it says SERVICE MENU press ITEM to scroll through service mode items.
To exit the Service Mode press [Go].
HP Laserjet 4V and 4MV service mode
1. Hold down the [On Line], [Form Feed], and [Enter] keys while powering ON the printer, until all lights are illuminated and the Display Window is blank. (If the Display Window reads 05 SELF TEST at this point, the keys were released too soon. Repeat this step until successful.)
2. Press the [Form Feed] key, then the [Enter] key. The message SERVICE MODE is displayed briefly, then the printer automatically begins a 05 SELF TEST.
After several seconds, both Control Panel Indicators turn OFF. (The printer may display 02 WARMING UP if it has not warmed up completely.) After the printer has warmed up and passed the self test, SERVICE MODE is displayed.
3. Press [Menus] once to display SERVICE MENU.
4. Once it says SERVICE MENU press ITEM to scroll through service mode items.
To exit the Service Mode press the [On Line] key.
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