Printer problem black lines running through printed copy

Does the line appear while copying or printing ?

To isolate the issue try to print a self test page :

1. Press and hold the Cancel button and then press the Start Copy Color button.

2. Release both buttons. The self-test page prints.

If you see lines on the test page then the issue is with the cartridge or cartridge contacts. Clean the cartridge and cartridge contacts inside the printer.

rRemove both the cartridges. Using a clean, dry lint-free cloth (a coffee filter works well), wipe the cartridge contacts, from the top to the bottom. The contact area of the cartridge should be rubbed briskly to remove the waxy lubricant material from the gold contacts.
The contacts inside the printer may also require cleaning. Using a clean, dry, lint-free cloth. Gently wipe the contacts, from the top to the bottom.
Reinsert the cartridge and print. If the issue issue persists replace cartridge(s).



If you do not see lines on the test page. Place the same test page on the scanner glass and make a color copy. If the lines are on the copied Image the issue is with the scanner glass.
clean the scanner glass :

Clean the glass and scanner backing

1. Turn off the all-in-one.
2. Unplug the power cord from the wall outlet.
3. Unplug the power cord from the back of the all-in-one.
4. Raise the lid.
5. Clean the glass with a soft dry cloth, or a sponge slightly moistened with non-abrasive glass cleaner or water. CAUTION: Do not use abrasives, acetone, benzene, or carbon tetrachloride on the glass; they can damage it. Do not place or spray liquid directly on the glass; the liquid might seep under the glass and damage the device.
6. Dry the glass with a chamois, cellulose sponge or soft cotton cloth to prevent spotting.
7. Clean the white scanner backing with a soft dry cloth or sponge slightly moistened with water, and allow it to dry.

1. Plug the power cord back into the wall outlet.
2. Plug the power cord into the all-in-one.
3. Turn the power on.
4. Close the lid; do not place any paper on the glass.
5. Load paper in the paper tray.
6. Do either of the following:
   • Press Start Copy Black to start a black-and-white copy job.
   • Press Start Copy Color to start a color copy job.
7. If the output is a full/half-black page, or has vertical black lines, the product needs service or contact HP for in warranty replacement.