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Re: Laser Printer Cleaning
Does the dirty background get lighter as you print additional pages?
Have you tried a new cartridge yet?
Unless your toner cartridge is leaking toner (you?ll see toner on the inside of the printer or leaking out if you remove the cartridge and shake) a simple cleaning is probably not the answer. Let me know and we'll pick up later.
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Most likely the heat roller is breaking down in the fuser. The fuser must be replaced. But before going that far, replace the toner cartridge, as it may have a bad cleaning blade. 85% of all print quality defects are cartridge related. This particular model of machine has a very brittle heat roller that more often than not wears out prematurely. This is true across the board for all of the newer HP low end laser printers unfortunately.
I have worked on hplj4100's for years and have ran in to this plenty of times.You will have to have the laser motor mirrors cleaned.That means removing the top cover and cleaning the toner and paper dust build up that has accumulated on the laser motor mirrors that is preventing the laser light from a 100% unobstructive scan to the photo-conductive drum inside the toner cartridge. I hope that this helps
if you have a laser printer you may need to clean the printer or install a new drum cartridge, if it is ink-jet you will have to clean the bottom of the ink cradle it sound like you getting grey background from a toner/drum cartridge.
Ehh, after futher reading it seems, as long as the EBT is not physically damadged, it is fine. So it all points back to the fuser. Ebay for $75 genuine HP.
But for others, just to rule out anything simple, disconnect from computer, and reset to factory defaults. Print Demo page. If still looks ugly, nothing to loose, run the service menu cleaning option, basicly heats the fuser very hot and passes a paper very slowly to catch any excess toner. I have never seen this cleaning option help but you never know. And if your print still looks like ****, you can save your beloved slow printing laser jet, replace the fuser.