Why is my HP Laserjet 3015 All-in-One Printer printing horizontal black lines on all pages that are printed or copied (haven't used the fax for a while, so don't know if that is also affected). These horizontal lines are about 1/8" thick and spaced every 3" all the way down the page. I've run the cleaning function several times and the result was that I would get 6 or 8 copies/prints without any lines, then it starts again. The last time I ran the cleaning function, it didn't do anything at all, and even the first copy afterward had horizontal lines. Sure would appreciate any advice or recommendations!

Advisable for users & tech guys: Lift document feeder unit clean "scan head" glass with glass cleaner, check..

Check your printer driver. The printer is doing what the driver is telling it to do. Check the "printing preferences" button. Set it up to print "1 page per sheet".

The fax scanning unit/encoder is dirty.

The fax scanning unit is like a camera. It take a picture of the document.

The glass plate is dirty and you may purchase a FAX CLEANING SHEET.

Officedepot

http://www.officedepot.com/a/products/470251/Office-Depot-Laser-Printer-Cleaning-Sheets/

or similar product to clean out the dirty area.

The dark strip is cause by semi-dry wipe out correction ink.


Give your unit a good cleaning and let me know.

dirt on scanner glass, clean scanner glass.

you have to clean or replace your scan unit, call the technician

Odds are that you have a bad toner cartridge; especially common when using remanufactured cartridges. (Staples, Corporate Express, etc.) Replace your cartridge with an OEM HP cartridge and you should be OK.

Does this happen both when copying and printing?
For printing solution, try another toner cartridge.
If lines continue to appear when copying (primarily through the automatic feeder) then lift the auto feeder, and clean the glass -mainly the narrow piece on the left side.

please rate solution :)

Machine may be in econo mode. To enable/disable.
Hope this helps

1. open the Printer Properties (or Printing Preferences in Windows 2000 and Windows XP).
2. On the Paper/Quality tab or the Finishing tab deselect EconoMode check box.

the printer would print but a line with missed ink would be going down the right side of the paper

Does this same thing happen if you just print a report out of it?

Here's the logic behind this.

If it happens on scanning or copying, but not on printing that's a problem with the scanning section.

If it happens on everything (scanning, printing etc) that's a problem with in the printer controls.

Usually on lasers, if it's printing related, the first thing to do is change the toner.
If the imaging drum (which is part of the toner cartridge) is damaged, it will leave lines down the page.
This is a fairly common problem on refilled toners.

If you have changed the toner, and it still does it, it's a different problem.