Direction to fix HP error code 0xc18a0001 “Ink System has Failed”
USE THE FOLLOWING DIRECTIONS AT YOUR OWN RISK
Turn the HP printer off and unplug the unit.
Facing the front, remove the right side of the printer.
Disconnect by pulling gently, both white flat ribbon cables off the main circuit board.
Find the flat white ribbon cables off the main circuit board
Disconnect the flat white ribbon cables by pulling them slowly from the main board.
Leave the flat white cables unplugged.
Plug the HP back in the wall and power it on.
You will get an error message, this is normal. Click OK.
Unplug the unit from the power source again.
Plug the white flat ribbon cables by lining up and slowly pushing them back into their connectors on the main circuit board.
Plug in the printer again and turn the HP on. 
The error message “0xc18a0001 - Ink System has Failed” will no longer be visible and your printer will be ready to go.
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