The Service Tool V.3900 will not recognize your device if it is turned on normally. You must manually boot the printer into hardware Service Mode first. Follow these precise button steps:
Is your Canon printer flashing an error code, refusing to print, and displaying a "Waste Ink Tank Full" message? You are not alone. This is a common issue for many inkjet printer users. Fortunately, the is a specialized, often necessary software utility designed to reset the internal ink absorber counter, effectively bringing your printer back to life.
While still holding the Stop/Reset button, press and hold down the Power button. The green power LED light should turn on. Canon Service Tool V.3900 Download
Clears the 5B00, 5B01, and 1700 errors, unlocking the printer instantly.
V.3900 is compatible with a wide range of older and mid-range Canon inkjet models, including: iP2700, iP4800, iP4900, iP7240. MG Series: MG2120, MG2240, MG3140, MG3540, MG5240, MG5340. IX & MP Series: IX6500, MP230, MP280. How to Use Canon Service Tool V.3900 The Service Tool V
Wait until the software displays a completion confirmation before unplugging cables.
A pop-up saying "A function was finished" or "Command completely done" will appear. You are not alone
Complete Guide to Canon Service Tool V.3900: Features, Usage, and Safe Download