Hi. I've got a HP M552DN that has no yellow or magenta on the page. All cartridges show 100% and all are genuine HP. I've swapped cartridges with new out of packet. Still the same. Supplies status page shows 100%on both, but no colour. Checked drum earth on the front/top of the cartridges. All look the same and seem to make good contact with the springs. I did place a piece of electrical tape on one of the contacts at the back of the machine, and get a solid yellow print, and magenta respectively. This obviously rules out the cartridge, motors etc. I'm thinking laser related? Can't see any laser shutters that might be closed. Do these have 2 lasers? I'm currently trying yo get hold of the service manual.
Thanks in advance
Thanks in advance
Comment