- Stand in front of your printer. You will see the exhaust vent for the fan on the left-hand side of the printer. The fan is just on the inside of that cover.
- To reach the fan, you will need to open the top lid. Warning! Make sure the printer is turned off before going any further.
- Look along the inside of the UPPER lid, along the left-hand side. Look for a metal "circle' or wheel. It will be partially obstructed by a piece of black plastic. That "wheel" is the exhaust fan.
- Try spinning the fan a few times. If it does not spin freely, there is some sort of obstruction or problem with the fan and service will probably be needed.
- If the fan seems to spin freely, close the lid and turn on the printer.
- If the printer comes up to the READY status, try printing.
- If the printhead error does not return, try using the printer for a few days but keep a close eye on it. If the error does not return within a week, the printer should be fine. If the error does return, the printer will need to be serviced.
Again, if you are repairing such a printer, check the cables going from the printer's engine board to the printhead unit for any damage. Also check the continuity across these cables. Pay close attention to the fan/mirror motor cable.