Going by the second link, to turn the machine on automatically I pressed the Stop button until the Alarm lamp flashed 14 times, then the Color button. However, the machine eventually turned off anyway. Curiously, with the machine off I was able to print once after some waiting, but not always. Next I tried the ScanGear instructions and found in Preferences that Auto Power would time out at 240 minutes, so I disabled Auto Power Off. Hopefully it now stays on all the time.
(My previous MG3620 had older software without the ScanGear function and stayed on all the time, which is why this new one had me stymied.)
