On Tue, 19 Apr 2016 19:22:43 +0100, "Ian Field"
wrote:

Recently, my Logitech mouse went tits-up and took the entire motherboard USB
subsystem with it!

The MOBO is still useable, but sometimes there's weird "artifacts" on the
video. A USB expansion card has solved the interface deficiency.

My question is; are Logitech mouse notorious for this failure mode?

I went through a lot of USB optical wheel mouse that I didn't like, then I
got the Logitech which was OK - till this happened.

Thanks for any help.

Maybe a short developed in the mouse cable. If the motherboard
doesn't have a polyfuse on the USB +5V line (many cheap ones don't),
a short could burn out the trace and take out the USB subsystem.

Did you have the mouse cable routed in a way that could lead to
it getting abraded, pinched, or repeatedly bent sharply?