A Solid black line down the left side of the page

If it's a thin, sharp line, it's just a blob of ball-point pen ink on the scanner glass. Lift the lid, and you'll see the narrow strip of glass that the scanner uses when you feed a document through the feeder. Clean that with a rag dampened with window cleaner, or, better yet, alcohol. Even a dot of ink too small to see will show as a solid black line on anything you copy, scan, or fax via the doc. feeder.
Don't use so much cleaner that it runs under the glass.

hi there...

if there was a lines bands on the paper trace. try doing a print cleaning on the unit..

Try sliding the blue tab on the drum unit side-to-side. If that does not cure it, you need a new DRUM UNIT

Get a damp soft cloth and clean the scanner glass. If that doesn't resolve the issue there is a chance the scanning unit itself is damaged.
Let me know.
Cheers, Chris

Every print job, copy, and fax have the solid black line across the pages. I have changed the drum and the cartridge and even tried cleaning mode. Please help!!! I have a HP Laser Jet 2840 All in One

i'm not sure if you're talking about a solid black band or a bunch of little stripes running down page. does it happen when you run an internal report or only on copies? if its a black solid band, check and make sure the bluish colored tab on top of the drum is all the way to the left side. if its a group of fine lines, depending on whether it happens on internal reports or not, it could be the drum is going bad or you may have a bad scanner. write back with a little more info if this suggestion doesn't work.

good luck,
razors

You have a bad scanner assembly, no parts are available to fix it.

Hello sir; Try to make a copy on this machine, if copy coming out good that's means the problem happen on remoted side.

can you try to post a copy of what you see wrong . and try to do an internal printout " function-6-4-start- under the fax button. "

When I Copy or Scan with my HP LaserJet 3050, a solid black line appears on the left margin of the page. . Can you suggest any solution to the problem. .