Perhaps a Prime Problem

[DrD]

The obvious: Is the computer plugged into a power source (both ends)? Of course, you thought and checked that. Is there actually power at the plug end? Sometimes those switchable power strips or surge protectors get toggled off.

If those things don't fix it, the chances of your USB connection "causing" the problem itself, are pretty slim. Sometimes, just cleaning the computer, which includes cleaning dirt from fans, and checking the internal cable connections, may be all it takes to restore operation.

Just trying to be helpful, here, not wanting to suggest that you haven't already done things of this sort ...

-Dale-