april backous

asked May 17, 2010 at 10:46am
Hp HP Color LaserJet 2840

hp color laserjet 2840 printing grey lines

our 3 year old color laserjet 2840 is printing grey lines on everything we print out. We've changed the black toner and the imaging drum. We've done the self cleaning mode at least ten times nothing is making them go away! Anyone else hear of or had this problem? Any advice????
Pull the fuser out the back of the printer. Just twist the 2 blue latches and it will come out. Look at the top roller (don't touch it as it might be hot). If you see the gray lines on it, then you'll have to replace it. Click on my name if you need one.
by moe on May 17, 2010 at 11:02am Add comment
Thank you so much for your response, we've been trying all day to figure this out. We pulled it out and see a grey line at each end of the roller. And there's alot of grey smudges on the ends of it as well. But we have the lines going horizontally all the way across our paper with about a one inch space between them. Do you still think its the fuser?
by april backous on May 17, 2010 at 11:15am Add comment
No. You didn't mention they were horizontal lines. The fuser can only cause vertical lines. Are the lines evenly spaced? What is the distance between the lines?
by moe on May 17, 2010 at 11:38am Add comment
yes they are evenly spaced and there about a inch and a half apart
by april backous on May 17, 2010 at 12:25pm Add comment
The closest thing to that would be a PCR or primary charge roller. That is 40mm or 1 9/16 inches repetitive defect. The PCR is contained in the Imaging Unit and that's one of the items you say you replaced. Just to be sure we're on the right page, the Imaging unit is the large unit that drops down into the front of the printer.
by moe on May 17, 2010 at 2:05pm Add comment
well I talked with a coworker and they said they're not certain that the lines didn't show up after the imaging drum was changed. And I know for certain that the imaging drum we bought was a refurbished one. There not cheap and we found a company that supplies them refurbished as a lower cost. Do you think we should spend the money on a new one with the chance that, that may solve our problem? And if it doesn't can we put the old one back in until it needs changed? Thanks agian for all your help!
by april backous on May 18, 2010 at 7:44am Add comment
I believe the only remanufacturing done on those with most companies is they clean it up and put a new chip in it so it registers as new. It could very likely be the cause of the problem. You should be able to get the company to exchange it. Hopefully, the next one will be better.
by moe on May 18, 2010 at 8:43am Add comment
Thank you so much for all your knowledge, we ordered a new imaging drum and are praying it fixes our problem. If not you'll probably see me again posting on here ;)Have a great week!
by april backous on May 19, 2010 at 8:53am Add comment
I have a similar problem - there are grey smudges printing horizontally on the right side of almost all pages. they are about 1-2 inches and smudged, not straight lines. I spoke to a someone at a repair place on the phone who suggested it was the fuser, but after reading this, am not sure. Any suggestions?
by apreis on Jul 22, 2010 at 11:33am Add comment
The fuser is real easy to remove. 2 blue latches on the back and it pulls out. You can look at the top roller and if you see the marks, it's a bad fuser. Since that's pretty unlikely, my money is on the Imaging Unit. That's kind of pricey at over $150.
by moe on Jul 22, 2010 at 5:51pm Add comment