Canon Service Tool V.3900 Download Upd May 2026

With the printer off, hold Resume/Stop , then press and hold Power . While holding Power, press Resume/Stop 5 times (6 for some MG models), then release both.

Connect the printer via USB (wireless is not supported) and open the V.3900 executable. Canon Service Tool V.3900 Download

The Power light should stay solid green. If it blinks, other errors are present and must be cleared first. With the printer off, hold Resume/Stop , then