Question about Canon PIXMA MP780 All-In-One InkJet Printer

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I constantly get the error code 6C00. Ive checked all the possible paper jams and there is nothing there. Ive also tried turning off as well as unpluging for aperiod of time and rebooting my computer still doesnt fix the problem. Printer says to check jams press "ok" Tried that still doesnt work. My printer is not very old. How can I fix this?

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The printer has a Reset mode- somewhere. But different makers/models have different settings. Try the manual and if not mentioned there try the Canon website. Failing that try this- with the printer switched off press a combination of 2 buttons[any 2] with them pressed switch the printer on did it reset?- then try another combination. take a look also at also here

Posted on May 18, 2007


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Remove the jammed paper by pulling it from the front or top of the printer. If it does not come out, restart the printer to eject the paper. If the paper fails to come out or rips, remove the cover and retry. Once you have removed all visible paper, check paper sensor paths for debris or damage, blowing it out as needed.

Reload the paper as recommended and print a test page using the printer's software. If the error continues, the sensor that generates the error may be damaged. If so, take your printer to an authorized service center.

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It is possible that a previous paper jam has left a piece of paper inside the machine. If you cannot see any paper jammed at either input area, open the rear cover and look in there. Otherwise, you can try to reset the product:

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Turn the printer off and on to see if it can automatically clear some or all of the jam. Many printers provide an error-code listing on the front panel display for the area where the jam occurred. If your printer shows an error code, be sure and check the printer manual to see if that identifies the area of the printer where the jam occurred. 
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