I was using generics successfully for quite a while. When I put a genuine one in the problem left, but I haven't printed much since so it isn't definitive. I believe this issue occurred through multiple generic brand cartridges.
Ok, thanks for the info. I’ll try a genuine 51H and see if it solves the problem. I really don’t see how the toner cartridge can affect the roller speed inconsistency, but who knows …🤪
