Is there a way to perform a factory reset or clear persistent errors on the Canon G3020 printer?

Performing a factory reset on the Canon G3020 can clear persistent errors and restore the printer to its default settings, but it will erase all custom settings, including Wi-Fi configurations. To perform a service mode reset: power off the printer, hold the 'Resume/Cancel' button, then hold the 'Power' button. While holding 'Power', release and press 'Resume/Cancel' five times, then release both buttons. The printer should enter service mode. You can then press the 'Resume/Cancel' button to cycle through options (e.g., four times for waste ink counter, five times for printer initialization). After selecting the desired option, press the 'Power' button to confirm. For simple errors, a prolonged power cycle (unplug for several minutes) can sometimes clear transient issues without a full reset.