Hi,
Our 2840 will print all colour except yellow. I have run an engine test which prints CMK only in columns. i have printed a test page and again everything but yellow. i have just changed the toner with a new genuine cartridge and still no yellow. I can even rotate all cartridges to change and pulled out drum to see under but I can't see anything wrong (i am not a technician either so not sure what looking at).
Any ideas how i can get the yellow to print?