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How to Identify and Fix Common Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

An Er/04, Er/05, or Er/06 error message indicates a paper jam. Find and clear the printer of any jammed paper, or reset the printer if the printer has no jammed paper.
The error code E06 means Cover Open.
Connect the printer and it may automaticallt install the driver. If not go to the Devices and Printers folder, Add a Printer, choose the correct port, Next, Windows Update, (wait a few minutes for the list to repopulate), select HP for the manufacturer and the HP Laserjet 6P, Next.
The printer is either low in toner, the density is set too low, or the Economode may be turned on. Remove the toner cartridge and shake it. This will redistribute the toner and often will temporarily solve the problem. However, this usually indicates it is time to install a new cartridge.
Paper Jam in Cartridge Area.
If you see “Scanner Error 6” on your control panel for the M375 or M475, please check to see what version of firmware you are using (click the Information icon (blue circle with “i” in it) on the control panel to display the firmware version). If it is older than 20120626, you will want to upgrade your firmware.
E4 Error Code: Abnormal Voltage or Wiring Connection. E5 Error Code: Console/Control Board Miscommunication. E6 Error Code: Control Board Malfunction.
The LaserJet 6P and 6MP were introduced October 1996. They included infrared technology, for wireless printing.
Requirements: Operating System – Windows 7, Windows 8, Windows 8.1, Windows 10.
Error indicates it is Lower exhaust fan failure. 1. Check the fan on the lower left side of the product.
If you have received this warning on your PC, it means that there was a malfunction in your system operation. Error code “error 6” is one of the issues that users may get as a result of incorrect or failed installation or uninstallation of software that may have left invalid entries in system elements.
If your printer`s status displays “Printer in error state,” there may be a problem with the printer itself. Make sure the printer is turned on and connected to your PC by Wi-Fi or cable. Check it for low paper or ink, and be sure the cover isn`t open and the paper isn`t jammed.
The error displays for scanner hardware or power issues, such as a scanner bar jam or calibration issue, low scanner bulb temperature, or an internal or external electrical problem.
Cable connection between the inverter and the grid is poor.
06 Voltage Drop Voltage Drop by Excessively Low or High Voltage to Outdoor Unit Voltage Drop of Power Supply. Incorrect Wiring or insufficient Capacity of Power Supply Wiring.
Error indicates it is Lower exhaust fan failure. 1. Check the fan on the lower left side of the product.
E01 means drive communication error;E02 means motor abnormality;E05 means overcurrent protection;E06 means motor protection;E08 means sensor error. For these codes issues, please contact with our support for help.
The E6 error is normally related to the missing/incorrect reading of the signal position of the inclination motor and derives 99% from the motor tilt and problems in the connection because the motor board passes the signal directly to the console, without any modification.
Recommended action. Turn the printer off, wait 15 seconds and turn the printer back on (using the power switch located on the back of the printer). The error code should not appear again.
06 Error To continue turn off then on or a 55.02. 06 Error To continue turn off then on error is displayed on the control panel, it indicates that there is an issue with the NVRAM memory. Turn the printer off, and then back on to clear the error.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP Laserjet M3035xs RFU Upgrade
ANSWER : There’s no way.

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evenly spaced horizontal lines on hp laserjet III printout
ANSWER : The lines would be a toner cartridge problem. Which paper tray? The MF tray or the optional paper cassette?

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LaserJet 4 won't Power Up
ANSWER : I haven’t seen that particular behavior on that model. It either works or it doesn’t. My first choice would be the power supply.

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HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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How to copy a card slot in HP laserjet 4250N
ANSWER : None that I know of, using a computer is likely your best option but I never attempted it.

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What repair needs to be done for a "50 needs repair" message on an HP Laserjet IIIP?
ANSWER : I don’t know what you mean by good toner cartridges. They haven’t been built in about 10 years, so if they are new OEMs in the box, they are guaranteed to fail. The 50 error on that printer is mostly a burned out fuser lamp. This site was sold, so as you can see, there are no more kits available.

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HP Laserjet 4200 50.2 Fuser error
ANSWER : if you are using a good fuser the next part to try would be low voltage power supply

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Black line printing in the middle of the page from top to bottom
ANSWER : Take out the toner cartridge and look at the drum. If you see the line, replace the cartridge. If you don’t, then you need to replace the fuser assembly.

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