T Echo locked up?

Hi all
My T Echo has locked up on its own? I’ve tried a reset and it just goes into a constant boot loop.
So I can’t reflash it as as soon as it connects to my pc it disconnects ?
Any ideas or solutions would be appreciated, thanks.

Hi all
I managed eventually to get the T Echo to reflash ( just kept trying until I got lucky) and all seems to be working ok.
73