Its' an HP model OVU400102/71.  Bought it from Ebay to use with the Pi about 3 years ago and has just stopped working.

Pi reports at bootup something about the USB port not responding (I forget the actual text).

There's a wee box (receiver?) and the remote itself.  Batteries been replaced. I suspect the receiver has

died. Can I test this anyhow?  If connected to Win 10 PC it just says not recognised.

Any thoughts on where I might get another ?  

Many thanks.