Reset reset Canon PG40 PG41

Power off printer
Hold down STOP/RESET button then Press and Hold down Power button
Keep Power button down and Release STOP/RESET button
Push STOP/RESET button twice
Wait 20-30 seconds - our LED showed Idle
Push STOP/RESET button four times
Push Power button twice Power off
Next time the printer is started the waste count will have been reset

from dsacme.blogspot.com