If your printer is missing a color it could be caused by (off the top of my head) 3 possibilities.
1. High voltage board
2. laser/scanner assembly for that color
3. DC controller might need a firmware upgrade,
www.hp.comRun the PQ diagnostics, check the cyan color
Run the Cartridge Disable diagnostic. Remove all cartridges and take the black cartridge and insert it where the cyan normally is. If the black prints in the cyan slot, your cyan cartridges are bad. If the black doesn't work then go to #3 above. It won't cost any money to upgrade the firmware. If it still doesn't work call in a printer tech.
At this point you may need a printer tech.
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