Unknown Printer

How to Identify and Fix Common Problems ?

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

To initialize NVRAM

When the display begins showing the memory count, press and hold until all three lights on the control panel are lit.

a 52 Scanner error indicates the laser/scanner which writes the image to the drum has malfunctioned. This is a hardware error and most times the actual laser/scanner assembly needs to be replaced.
A Black Cartridge is Low or Very Low message displays when the amount of toner in the cartridge is below a certain percentage. This message is a reminder to have a replacement toner cartridge available. You do not need to replace the toner cartridge until print quality becomes unacceptable.
This error might happen at any time for multiple reasons. The most common causes are due to the printer being asked to perform an action that the firmware is not capable of, and might not have been designed to perform, such as: Printing files with unsupported programming commands.
🛑The default username and password for your printer would be blank or admin for both username and password.
The default administrator or root password for all HP-provided Build Plans is: ChangeMe123! CAUTION: HP strongly recommends changing this password before deploying to any servers. See Set (encrypt) the administrator/root password for details.
A 52 error code is related to a failure of the laser scanner, the device writes the image to the drum unit in the printer before the toner is transferred to the drum. If powering off and leaving off for a few minutes does not clear the error then most likely the scanner is dead.
Turn the printer off, wait 10 minutes, and then turn the printer on. 2. If the message persists, reseat the fuser. If that does not work, replace the fuser.
If your PC or the LCD screen on your printer is telling you that your ink cartridges are full but no ink is passing through to the paper, then it`s most likely that you are dealing with a clogged printhead. Blurry documents and images that appear faded are also signs that it`s time to remove the excess ink.
When color ink is expended and black ink still remains, you can continue printing for a short time using only black ink. However, you should replace the expended ink cartridge(s) as soon as possible. See the following section to continue printing temporarily with black ink.
This error might happen at any time for multiple reasons. The most common causes are due to the printer being asked to perform an action that the firmware is not capable of, and might not have been designed to perform, such as: Printing files with unsupported programming commands.
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.
By default there is no administrator password in the preboot menu, and if there is a password someone added it and without that password there is nothing beyond replacing the formatter you can do.
To perform a NVRAM initialization: Turn the printer power off. Press and hold GO. Turn the printer power back on and continue to hold GO until the Attention, Ready, and Go lights turn on. Release GO.
An NVRAM initialization clears all settings/values and forces the printer to revert to default or empty/blank settings.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

My 2550n Color LaserJet does not want to print in color
ANSWER : That model had issues with the carousel solenoid sticking. That might explain why it works after you let it sit for 10 minutes. The solenoid gets hotter with use which causes the deteriorated foam on it to become sticky and hold down the release plate instead of letting it go. This allows the carousel to spin when it is supposed to stop for each color. The solenoid is located on the right side of the printer. If you open the lid, it is just behind the opening at the top right. You need to remove the top of the printer and scrape off the goo on top of the solenoid body. I put a piece of thin sticky backed felt to replace it. Other people use electrical tape.

Read Full Q/A … :
Unknown Printer

HP Color Laserjet 3800 problem when printing color
ANSWER : Do a cold reset

Read Full Q/A … :
Unknown Printer

My printer feeds through one piece of paper all the way and then a half piece of paper and stops. I pull out the paper to stop the paper jam and then it prints but sounds rough. After printing, it doesn't feed the paper all the way through.
ANSWER : And the first 2 sheets, the full and half sheet that go through first, are blank.

Read Full Q/A … :
Unknown Printer

HP LaserJet 500 Color MFP M575 Scanner Calibration
ANSWER : 0512 is service code for m575

Read Full Q/A … :
Unknown Printer

Need help for Epson Stylus color 3000 print head?
ANSWER : I need help changing the print head in my Epson 3000 – I have 2 printers – one will not stay in alignment and the other black ink is plugged and I have soaked it and cannot get it to budge.

Read Full Q/A … :
Unknown Printer

Reset HP Color Laserjet 4700 transfer kit
ANSWER : How about the situation when resistor does not reset the transfer belt count and even new transfer belt out of the box is not doing it. Do you have any idea how to solve this problem? I did reset transfer belts and fusing units on several HL 4700 printers with no problem but also I came across few which were not possible to reset even with oryginal parts.

Read Full Q/A … :
Unknown Printer

HP 4700 Color alignment
ANSWER : Thanks much, this method worked for me.

Read Full Q/A … :
Unknown Printer

color is not printing true
ANSWER : I changed all toners and drum and it is still doing it.

Read Full Q/A … :
Unknown Printer