My controller (1708) stopped working over USB or with batteries.
My controller used to work over a simple micro-usb cable or with aa batteries over bluetooth on my pc.
Now, when I put brand new batteries in and try to turn it on, it flashes white twice then turns off.
When I removed the batteries and connected it with a usb cable, nothing happened.
But when I connected it with a usb cable and had batteries in it, I pressed the xbox button and it turned on. It then worked for a few minutes. Then I was surprised to have it disconnect, the brand new batteries ran out. I then found the batteries to be very hot.