Streaking is usually caused by a worn out drum unit or spent toner cartridge. … Remove the cartridge and rock it back and forth a few times over a trashcan to evenly redistribute the toner powder. Some toner powder may emit from the cartridge as you do this. Reinstall the toner cartridge and run a test print.
Beside this, what causes black marks on paper?
Black lines and smudges on printed output can be due to dirty printers. The accumulation of dirt, dust, or toner on a printer’s rollers or transfer belt can leave tracks on the page when the paper moves through the printer. … That will leak toner onto the printer and paper, which leaves black marks on the printed output.
One may also ask, why is my black ink streaky? If your print-outs are streaky, faded, have lines on them that should not be there, or are otherwise poor in quality, this may be due to a problem with the printer or a low ink or toner supply. You may be running out of ink or toner. … Try cleaning the print head. See the printer’s manual for instructions.