Here's what worked for me....
(and no this is not the same as everyone else's results)
1. Turn off power and leave plugged in.
2. Open lid and slide ink tray to the far left.
3. Press power button 5 times.
4. Close the lid and let the machine reboot.
At this point the printer should return to home screen. When I first did this I tried printing and the error returned. So I did it again and tried going to the Maintenance menu (on printer) and running a cleaning cylce, error returned. Printing a test page also resulted in error returning. What finally worked is after step 4 I placed a page on the scanner bed, and ran a black and white copy. It took several minutes but it finally spit out a page. So my step 5 is....
5 Open scanner lid and place document (with something on it) on scanner bed. Closer scanner lid.
6. Run black & white copy from printer menu.
If my last two steps don't work for you I suggest trying any other processes that might result in the printer actually having to print a page. Some people had results with the cleaning processes, copying worked for me.
And just a heads up to Canon, I called tech support and they ran me through a process similar to this but more elaborate that didn't work at all. They then basically said that the printer was worthless (because repair costs outweigh cost of new models).
Screw you Canon. The printer still works you just don't give a **bleep** about taking care of your customers because the model you have created (mentioned by someone else in this thread I believe) involves making crap disposable printers and making all your profit off the ink. This is disgusting and it creates a tremendous amount of electronic waste.
Companies with policies like this should be forced to pay for the costs of electronic waste disposal since they profit from its creation.
