Use only if you see error 5B00 or 5B01 (waste ink pad full). This requires entering service mode.
directly from the back of the printer without turning it off first. Unplug the cable from the wall outlet and wait at least 60 seconds to drain all internal charge. Plug everything back in and restart the device. JustAnswer Troubleshooting Tip: If you see the alarm light blinking how to reset canon mg2540s
Critical Warning: Resetting the counter without cleaning the pad will cause ink to spill inside your printer, potentially ruining the logic board and power supply. Only do this if you plan to open the printer and dry/clean the pads, or you accept the risk. How to reset Canon PIXMA MG2540S Quick reset (soft reset)