LASERandDVDfan said:
Check the condition of the drum and the toner cartridge. - Reinhart
I think that is no light reaching the drum. Used to see this in a local
factory - half the page would go black when half of the laser output was
obscured by dust. The laser scanner is usually a flatish black box with
warning labels, often at the top of the printer, and somewhere on it will be
a slot where the light is supposed to come out. This will have an automatic
shutter that closes when the printer cover is open. Try cleaning through
the slot, although if it has suddenly fialed, it may be that the lamp has
died or the shutter is stuck closed.
Good luck
Peter