Printer headaches

Our Cannon Printer, http://www.usa.canon.com/cusa/support/consumer/printers_multifunction/pixma_ip_series/pixma_ip6600d
now gives this: Error Code 6A00. It shows on the built-in screen on the printer itself.

- - - Manual says snip starts: - - - -

POWER Lamp and Alarm Lamp Flash Alternately
Possible Cause: An error that requires contacting the Customer Care Center may have occurred

Try This:
Disconnect the printer cable from the printer, and then turn the printer off and unplug the printer from the power supply. Plug the printer back in and turn the printer back on after leaving it for a while.
If the problem remains, contact the Customer Care Center.

--- end snip from manual - - -

WTF?