Try the old power off, remove power and unplug then plug the cartridges back in. After you power up if there is a date and time setting be sure it's current.
Hi! I just moved this printer to a different room and plugged in. Now says that M, C, and Y toners are not compatible and it won't work. They are newer cartridge, pretty full, so I don't know why this is happening. Anyone else ever had this problem? I don't want to change these expensive cartridges when I know they aren't empty. Any help appreciated!