Hi all,
My TM WH throttle gave up the ghost more than four years ago. After much frustrating research I happened across reports that a "bricked", meaning non-functional when plugged in to a USB port directly, throttle could be restored to normal function by under-volting it through a crappy passive USB hub. It works! And has been without issue ever since.
Hopefully this will inform further diagnosis, given that these throttles are not cheap and the replacement PCB (the only "recognised fix") from manufacturer is expensive.
All the best,
Sgt_Baker