Hi Herbert,
I'm an HP Employee
I would like to give you a small piece of information based on the damage caused to transfer roller.
The cause for this could be a refilled toner cartridge that could damage the parts involved in the paper path.
The quality of the toner itself is the main reason for the damage caused and results in the print quality issues.
If you are using Genuine HP Cartridge, then we will have to look into the total pages printed. because the duty cycle of the printer as per data sheet is 225000 so if it has crossed more than this or nearing to this number. then i would accept the fact of the damage caused now. I request you to please print a config sheet, Usage page and supply status page. and check for the total pages printed and based on that we could find out the reason for the damage caused to transfer roller.
Hope this provided suitable answer
Roshan
Say Thanks by clicking the Kudos Star in the post that helped you.
Please mark the post that solves your problem as Accepted Solution