Printer Repair Questions? Ask IT Technicians for Answers ASAP
You can try replacing the toner cartridge and make another blank copy. If the streaks remain, they are likely the result of toner, debris or scratches on the copier drum.
Turn off any bright lights in the copier room to avoid damaging the copier drum. Remove the toner cartridge again so that you can access the drum. Lift the drum carefully out of the copier using a microfiber cloth instead of your bare hands.
Examine the drum for cracks or scratches; if any are present you will need to replace the drum. Remove any toner or other debris from the drum by spraying it with compressed air.
Place the drum back in the copier carefully, and replace the toner cartridge. With the glass cleaned, loose toner removed and the drum cleaned, the streaks should be gone.