1 PIXMA Pixma MP140, MP145 printer off by pressing the power button once.
2 Hold the button "Power" and "Stop / Reset" at the same time. The power light turns on the unit.
3 Continue holding the Power button, but let's go "Start / Reset" momentarily, then press twice.
4 Let go of both the "energy" and "Start / Reset" buttons. The PIXMA Pixma MP140 or MP145 is currently in the "service" and standby for a selection of services.
5 Press the "Start / Reset" four times. The power light on the unit will go from orange to green and the printer is reset.
6 PIXMA Pixma MP140 or MP145 disconnect from the electrical outlet and then plug it back in and turn it as you would normally.
Whereas software resetter for Canon Pixma MP140 and Canon MP145 you can using MPtool Software
Tag: reset Canon Pixma MP140 and Canon MP145 manual - software resetter