Try reinstalling drivers but my best guess is that they are damaged by falling or something, if they are under warranty sent them to repair. If not you may try to open them and check what happened inside.
Are they plugged-in all the way from both sides?
Any chance that you did damaged the cable ?
@No, plugging it to xbox controller doesnt make any difference. Its more of a user-faulty damage >D
Try reinstalling drivers but my best guess is that they are damaged by falling or something, if they are under warranty sent them to repair. If not you may try to open them and check what happened inside.