Wires can be replaced! If they went to the power supply :\ you'd have to either buy a new one, or pop open the case, strip and twist/solder the wires back into place. I'd like to think anyone my age could fix it..... Ah, hopefully, the motherboard connecters are still okay, but it's still doable! Just make sure no bare wire touches anything metal or another wire - ever.
VicariousE
Did he do this while the computer was plugged in? Were wires torn out?
Hope you can get it to work again!
killer88854
Nope not plugged in, but you were right about the wires.