I have an HP Colour LaserJet 4500 and recently it displayed a message to the effect that the black (K) toner was low. I have configuration set to continue until toner runs out but before that happened it started to show grey bands vertically down the page. I decided to change the toner in the hope that it might cure the problem but it didn't.
I can see rings of toner around the imaging drum if I take it out. It does seem to be picking up surplus toner but I've no idea where from.
At present I have:
Transfer Kit showing 96% life left Fuser Kit showing 91% life left Drum Kit 68% lif left
Any suggestions would be appreciated. If you suggest cleaning something would you please explain where to find it because I probably won't know.