HP LaserJet 4MV

How to Identify and Fix Common Problems ?

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An Er/04, Er/05, or Er/06 error message indicates paper is jammed inside the printer. To resolve the issue, find and clear the printer of any jammed paper, or reset the printer if the printer has no jammed paper.
An error 02 indicate a Cartridge door problem, try following below steps to ensure it is property closed, else this is likely a failure with the door sensor which likely requires servicing the printer: https://support.hp.com/us-en/product/hp-laserjet-pro-mfp-m28-m31-printer-series/16647082/document/c0…
If you are seeing the 41.3 error on a LaserJet 4, 4Plus, or 5 series printer, and you find a blank sheet of paper in the path, your printer is probably having a failure with the solenoid on the paper feed assembly. This is becoming a common issue as these printers get older.
The error messages might display for one of the following reasons: Er/11 or Er/13: One or more toner cartridges are not compatible with the printer. Er/14 or Er/16: One or more toner cartridges have been protected on another printer.
Check for obstructions in the carriage path

Open the cartridge access door to get to the carriage inside the printer. Make sure the carriage is not obstructed by gently sliding the carriage side to side. Look for and remove any obstructions in the carriage path, such as crumpled paper or dislodged labels.

An Er/03 error message indicates the printer failed to pick a sheet of paper to print. Remove the stack of paper from the tray and check the condition of the paper. Reload the paper, and then try to print, copy or scan. For detailed troubleshooting, go to Printer Does Not Pick Paper.
41.2 Error Code on HP Laser Printers

The arcing occurs in the toner/transfer area, and can be caused by a defective toner cartridge, bad high voltage or ground connections to the toner cartridge or transfer roller, or a defective high voltage power supply.

The 51.01 and 51.1 errors are fairly common error codes on the HP LaserJet 4100, 4100N, 4100TN, and 4100DTN series printers. This error indicates a failure with the laser scanner assembly, which is a high-failure part on these models.
(From: Tom Dunn ([email protected]).) Error code 51 indicates loss of laser beam for over 2 seconds. Check -5 V, also make sure there is no interlock mechanism damage, and +5 V at J451-1 on Laser Drive PCA. You may need new laser unit.
(code 188): most likely due to your bank declining the transaction. You will need to contact your bank to allow the transaction to proceed.
The error messages might display for one of the following reasons: Er/11 or Er/13: One or more toner cartridges are not compatible with the printer. Er/14 or Er/16: One or more toner cartridges have been protected on another printer.
Turn the product on while you press and hold the Resume button for 10-20 seconds. The Attention light turns on. Release the Resume button. The Attention and Ready lights cycle while the product restores factory defaults.
TS-05. Problem. Solution. The security information (SSID/Network Key) is incorrect. Confirm the SSID and Network Key.
Do not Honor (05) is the most common and general message for card transactions that are declined by the Bank. It indicates that the Issuing Bank will not validate the transaction. It is caused by many factors such as mistyping, insufficient funds, etc.
This indicates a paper jam in the Input tray area. The Attention light blinks, the Paper light is on , and the control panel character display alternates between Er and 05. This indicates a paper jam in the Imaging drum area.

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