Hp1020 printing grey backgroud - HP LaserJet 4 plus Printer

Causes
Print density setting.
soluitons
The print density may be set too high. Try adjusting the print
density. For details refer to the printer's operation guide.
Causes
Defective drum surface potential.
soluitons
If a drum unit which is known to work normally is available for
check, replace the current drum unit in the printer with the normal one. If the symptom disappears, replace the drum unit with a new one
Causes
Defective main charger unit.
soluitons
Replace the main charger unit
Causes
Defective developing roller (developer
unit).
soluitons
If a developer unit which is known to work normally is available for check, replace the current developer unit in the printer with the normal one. If the symptom disappears, replace the developern unit with a new one


check ifyou want service maual you can send mail to [email protected]

Is the printer connected locally to this print? If so move it to a computer that has been working ok and try it on that computer. If the problem moves with the printer then the problem is the printer not the driver or computer. If the printer is networked make sure the IP address is not the same as another devise on the network. Also print to it from another computer on the network and see if it prints.

ENGINE CONTROL PCB ***'Y problem

You have bad toner or a bad toner cartridge. Get a new cartridge.

try to degus the monitor

Friends try to remove the scanner section of the printer and clean it this make solve your problem

get new drivers

Hi please go through this link

http://h10025.www1.hp.com/ewfrf/wc/fastFaqLiteDocument?lc=en&cc=uk&dlc=en&rule=43040&docname=c00384459

That model is a "Host-based" language printer. You should use some other printer which supports PCL ...

A common reason for background shading is a low toner. Install a new genuine brother toner. If you have already loaded a generic toner in the drum unit, it is too late. You have damaged the drum asm. You can still buy a new 2800 with new supplies for just a little more than a new drum asm. Did you have the grey baqckground before you worked on it?

I’m happy to help further over the phone at https://www.6ya.com/expert/jayw_0e86fb055a7b73de