This means the software cannot communicate effectively with the printer firmware. The most common causes are that the printer was not put into Service Mode properly, or you are trying to run the tool over a Wi-Fi connection instead of a USB cable.
If you want, I can:
MG2570S, MG3070S, MG5550, MG5650, MG5750, MG6850 Pixma IP-Series: iP2870S, iP7270, iP8770 Pixma MX-Series: MX477, MX497, MX537 canon service tool v5204 download link
Keep holding the Power button, then the Stop/Reset button. This means the software cannot communicate effectively with
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Release both buttons. The power LED will flash and then stay solid green, indicating successful entry into Service Mode. Step 2: Running the Software Download and extract the archive.