After a recent power cut in a thunderstorm my printer stopped printing in colour. The computer was on standby and the printer had power on when the power cut occured. I have gone through the maintenance proceedures of cleaning printheads etc, and re-installed the drivers, but to no avail Ichecked the ink tanks, they're OK BUT Black ink was present where the tanks fit to the printheads. I cleaned the black ink from each tank and also cleaned where they make contact with the printheads. Still no printing. Help and advice needed Please.