both buttons. If the green light stays solid, you've successfully entered the "waiting room" for the fix. The Fix: Canon Service Tool V5306
Service tools are often used to reset ink absorber pads or enter factory mode. I have written this post assuming the user is fixing a specific error (like "5B00" or "P07") that requires resetting the waste ink counter. A disclaimer about warranty and risks is included. Canon Service Tool V5306 Free Download Windows 10 Fix