My Laserjet 4300 just started printing pages with two black lines down the center. They are irregular lines that look like there is some ink in the machine. The 4300 is only one year old.
I have tried:
*Cleaning any of the rollers that I can see with a roller cleaner fluid
*Changing toner to a brand new cartridge
*Buying one of those moistened paper path cleaners for laser printers and running the cleaning page through the printer a few times.
None of this has resolved the problem. Anyone know how I can access the internal rollers of the machine, or any other ideas on how to solve this?