for all computer plugs. Also if any of the devices like host powered USB say scanner or Digital camera may take the power direct from the USB cable if any of these are fitted and a over load may have been the reason for it to go in ther first place.
It is possible that HDD, M/board, Memory or Modem may have gone but only on rare occassion's this can happen.
Most important is make sure your friend gets all his plugs to go into one of them surge protectors.
Many places even myself sell them from as little as £8 for a decent one which includes £1000 or insurance cover if you reg the protector.
Some Places to aquire a surge protector are:-
Argos, B & Q, or Me !