On Jan 31, 6:52 am, JW wrote:
Only for a low power hub. A high power hub can deliver 500mA. Power
requirements for the attached device are negotiated with the upstream
controller.

Again, the specs. USB ports are limited to 100 ma until that USB
device requests and is granted higher power levels.

A previous post quotes USB specifications:
... over-current limiting mechanism must be resettable
without user mechanical intervention

The failure occurred apparently because the motherboard design
violated basic industry requirements. And as Hugh Prescott implies,
this problem is not an isolated event. So what is the manufacturer's
name on that computer?