I believe I followed all the instructions in the MX850 series On-screen Manual for Paper Jams. I have looked throughout the printer and found no paper. I don’t think it ever attempted to get paper from the cassette, but instead has managed to get into some “state of insanity” from which I have been unable to clear. I’d guess I’ve seen that error show up 20+ times. When I press “OK”, it goes to “Processing” for about 30 seconds, and then beeps and returns to the Error message. It always comes back to the above Error message. I fiddled with it for over an hour trying everything I could think off (turning on and off, power cord removed, tanks and print-head out, etc). There was no error code, just the above text.Īt this point, the MX850 was locked up. Shortly afterwards, I got the error message on the LCD: I pressed the “Feed Switch” to change it to “Lower Cassette tray”. The MX850 complained about no paper in the rear tray.
I used the front panel LCD to have a nozzle check done. The MX850 wasn’t connected to a computer, but was in standalone mode. The “Feed Switch” was set to “Rear tray”. I had plain paper in the cassette lower tray, and no paper in the rear tray. I think the following is the sequence of events, but I am not completely sure: I haven’t figured out how to reset the error.
My out-of-warranty Canon MX850 All-in-one is locked up with a bogus report of Error: Paper Jam.
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