a firend of mine just drop his pc around for me to fix, he said that the bios has gone, so i booted it up and get the bad bios chucksom error message, i'm read the manule and that said used the motherboard cd to recover the bios, i tryed this , got the bios back and it hung, or i reset it and i get teh bad bios eooro again, is this a new bios chip or replacement mainboard time ?