My brother rang me and told me that he was trying to plug his camera in to the back of his PC and realised he was pushing the wrong end of the usb cable into the slot.

He saw a spark and then his system shut down.

He was then unable to boot it.

He told me that there must be power as the CD player can be used to play a CD and listen to it via the headphone jack but other than that nothing else.

He is going to frop it off to me for investigation.

In the meanwhile any ideas on where the problem could lie ?

I'm guessing he's shorted the USB port which has then caused other problems.