Hello anovak.
Please try the following to see if we can resolve your issue:
1. Open the cover of the printer.
2. Remove all ink tanks from the printer.
3. Lift up the gray locking lever on the side of the ink tank holder.
4. Gently remove the print head from the carriage unit.
5. Place the print head back in and lock the lever down.
6. Place all of the ink tanks back in the printer.
7. Close the cover and turn the printer off.
8. Unplug the power from the printer. Leave the power unplugged for about 5-10 minutes.
Plug the power back in and turn the printer on. If the error persists, please visit the following link below to contact our support group for additional assistance with this matter.
http://www.usa.canon.com/cusa/consumer/standard_display/contact_us_consumer
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