Power source was disconnected for a week.
I have performed all Cleaning Operations (Bottom Plate Cleaning, Roller Cleaning, Print Head Alignment Value, Deep Cleaning) on my Canon MG6820 All in one. Printing from my PC results in a blank white sheet of paper. Copying a document the results are the same, printer puts out a blank white sheet of paper. No ink, nothing is faded, nothing is on the paper. Scanner feature works fine.