Believe the background theory to be unlikely, but you never know.
Based on the observations, power draw on the USB ports could be more likely.
If I were testing, I would try and isolate the problem.
Based on 3 Cameras, Most likely a common USB 3 hub in the Medit enclosure feeding a single cable going to the PC.
First, check the System Power settings to verify 'High Performance [Active]'
Also, under the power-->usb settings-->USB Selective suspend setting -->Disable (default: enabled for High performance)
Under Device Manager
Universal Serial Bus Controllers, hit and miss but Identify the 'hub'
RMB-->properties-->Power Management-->Disable Allow the computer to turn off this device to save power
Driver Tab-->Update Driver (Rollback/Uninstall for the hail mary)
could check the bios (UEFI) to see if there are any USB related settings
Interesting Article/Microsoft Utility for troubleshooting specific port behavior
https://www.techrepublic.com/articl...windows-10-with-microsofts-usb-device-viewer/ Now, if the 'power draw' is exceeding the usb port capabilities, a solution is a new USB3 Card or the 'Cameras' could be plugged into separate hubs thereby decreasing the individual load/port
Not so simple way to test. Exceptions below are unlikely due to the scanner working properly on another computer, however, still worth due diligence. It is possible the PC port is not supporting enough current draw (probable if the USB tweaks haven't helped).
Plugging each camera into a different 'Hub' on the motherboard could bypass the current draw.
note: generally USB slots on a pc motherboard are divided into multiple 'hubs'. Depending on the motherboard, don't assume that using two separate USB slots are on different 'hubs'. For instance, front ports and backports typically on different hubs whereas two side by side are typically on a shared hub.
Plug in each camera individually and check for stability. (As they are each being plugged into the same port, any exceptions indicate a bad camera, potentially drawing more current than nominal)
Unplug camera 3 and check for stability with 2 Cameras 'active' (If stable, it's a clue).
to Verify you are not dealing with a faulty camera I would then cycle through the iterations, (Unplug 1, stable on 2&3?)
Looking for consistent behavior with no deviations.
If a deviation is found, probably a camera starting to float out of spec.
Anyhoo, hopefully, a couple of more leads that might help...
