CanoScan LIDE 400 with MacOS - Settings to control scanner periodic status checks?

[BradW]

I have a CanoScan LIDE 400 connected to a MacBook Pro,   MacOS  Sonoma 14.5.   The scanner works just fine for scanning however, periodically the scanner seems to wake up on its own and briefly do either a self calibrate or power on status check, at least it briefly whirs and grinds like a short calibration or start up check.  It's kind of annoying that it does this periodically throughout the day and night as long as it is connected to the MacBook and the MacBook is on.  The only way I currently know of to quiet this scanner behavior is to unplug the scanner's USB connection and just plug it in when actually needed.   Is there another means to control this behavior?   I've no idea if the scanner is doing this on its own or if it's MacOS wanting to periodically check the scanner.  My Canon laser printer had a similar issue with calibration that I was able to change from its control panel.

[JayC1]

Hi BradW! Thanks for posting in the Canon Community Forum. I see that your CanonScan LiDE 400 will do a power-on cycle or self-check on its own when connected to your MacBook Pro.

I am a Technical Support Representative for Canon who supports multi-function inket printers and CanonScan scanners. I do not specialize in our laser printers, so I cannot tell you why they may have acted similarly to this scanner. I do know the LiDE 400, however, and I can tell you that the scanner is not designed to do a self-check on its own periodically when it is connected to a computer. The scanner software installed on your computer does not send a signal to the printer periodically. It will only communicate with the scanner if you use the program to initiate a scan.

When you connect your LiDE 400 to a computer, the scanner powers up and does the self-check immediately. It won’t do it again after that unless the USB cable is disconnected and reconnected.

It is possible that your computer is sending out a signal to make sure the scanner is still connected. The scanner may be reacting to that signal like it does when the USB cable is reconnected and power is restored. There is no setting on the scanner or in the driver that would prevent the scanner from reacting to signals sent by your computer.

The only settings you can make from the IJ Scan Utility window are listed in the following section of the manual. None have anything to do with how the scanner turns on or how it reacts to signals from your computer.

https://ij.manual.canon/ij/webmanual/ScanUtilityLite/M/3.1/EN/SUL/sul-104.html

I recommend that you contact Apple to see if there is a setting on the computer that can be disabled so that it does not send that signal.

I hope this information helps. Thanks for choosing Canon.