Sorry this is OT. Well sort of - the printer is attached to a linux box and shared via CUPS (RMS is welcome to ask me how I set it up).
Problem: The rollers are worn out. More than half the time it doesn't pick up the paper. This is an HP Deskjet 670C. Does anyone know how to fix this? I have heard you can roughen the rollers up, but I need to be sure I don't wreck anything. Any help appreciated. Cheers Yuri de Groot