After calling Canon support, it was indicated that performing the firmware update caused a hardware issue, and the printer will need to be replaced since it is out of warranty. My recommendation for others is if your G6020 works fine, please don't ap...
I also experienced a similar issue with the firmware update for printer model G6020 on 02-12-2023. After acknowledging to start the update on the printer screen, it shortly started flashing with error code 6800. Unplugging the power cable for several...