You tried moving the mouse to the other USBs, I assume? I know that you said you tried the camera, etc.. in all of them, but did you try a known working device? My best guess is dying USB ports on motherboard, or PSU failing.
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"I'm typing on a computer of science, which is being sent by science wires to a little science server where you can access it. I'm not typing on a computer of philosophy or religion or whatever other thing you think can be used to understand the universe because they're a poor substitute in the role of understanding the universe which exists independent from ourselves." - Willravel
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