Canon Waste Ink Tank Reset Procedures 1: Remove Cartridge2: Unplug the AC Power Cord 3: Hold down the RESUME button 4: Release RESUME after plugging in the AC Power cord. 5: Press the RESUME once within 5 seconds and release the RESUME . 6: Press and HOLD RESUME for two seconds or more and release it. 7: Press and HOLD RESUME for two seconds or more and release it. 8: Unplug AC Power Cord to set data.