Go get a new one made by the printer's manufacturer and let us see if the results are the same. If so, we start looking at the printer...or damage done to it.
I noticed my laser printer is printing kinda with lines in it.
Its a refilled toner cartridge but the black isn't solid like it should be it has some light streaks in it.
Whats causing this bad cartridge?
below is a picture to see.