if you can send photos of the board, most likely connector side we would maybe be able to help better, but from your description i would expect that either:
- the connector on the board got damaged
- the driver on Windows failed (if you are on Windows)
- you have a short on the board
- you have too much rgb - so the controller detect an over-current and shuts it down
- your usb hub is dying (if you use one) - had similar symptoms when mine was
- your pc usb controller is failing - rare but i seen it happen
- any other things, those are just the few that i could think of in 2 minutes