I'm using a 11-foot USB cable, which worked fine when I first set the printer up. I get the error even when I remove the cable, so I don't think it can be the cable. The 11 blinks indicate some sort of print head problem (I think)...
I've recently purchased a Canon Pixma Pro 9000. I printed four 13x19 prints without any problems, and then turned the printer off for a couple of weeks. When I turned the printer on tonight, it goes through a startup sequence and eventually fails. The error light blinks 11 times, then pauses...