Error 6A00 on my Canon MP750. The alarm light was flashing and the LCD message said to "CHECK PRINTER (PRESS [OK])" Here's what I did (after doing a hundred other things that didn't work): 1. I opened the printer as if I was changing an ink cartridge. 2. The ink cartridge carriage did not move to the center as it should (one of the symptoms). 3. I moved the ink cartridge by hand to the far left to expose the ink purge area at the far right (under the area where the ink cartridge carriage typically parks itself). 4. I used a small make-up mirror from my wife and a flashlight to look for paper fragments or anything else that might be jammed around in the ink purge area. The mirror was indispensable for viewing areas I couldn't possibly see otherwise. 5. Eureka! I found a some ink-soaked paper fragments crumbled against a roller near the ink purge 6. Now the fun part. While wearing a head flashlight and viewing the small paper jam in the mirror, I used tweezers and n...

Turn on the printer press menu press scan, copy, scan to enter service mode use> to get to nvram set ABS-M level to 0 Set ABS-P level to 0 Press stop to exit..........Done

Any idea how to fix it? The symptoms, besides displaying error #357, are: - print head does not move when I open or close the front panels(needed when replacing ink cartridges) - Message "Check printer. Press OK" - Alarm indicator flashes