If you need to wipe all custom settings, such as Wi-Fi configurations or passwords, use these button combinations:
Resetting your Canon PIXMA G3400 is a common maintenance task, typically required to clear the (full ink absorber) or to restore factory settings for network troubleshooting. How to Reset the Ink Absorber (Error 5B00) canon g3400 reset
Release both buttons. Wait for the green power light to stop flashing and stay solid. Press the Stop button 5 times . If you need to wipe all custom settings,
Press and hold the Stop button until the Alarm lamp flashes 24 times , then release it. This restores all machine settings to their original factory defaults. Resetting After Ink Filling such as Wi-Fi configurations or passwords