So i have a xenon motherboard that had the 12v fan mod.It was wired through the dvd drive. and one day i decided to flash the latest firmware to my dvd drive when i unplugged the drive and plugged it back in the to cycle the drive it sparked right when i attempted to plug it back into the drive. then the whole xbox just shutoff about 3secs later. ever since it sparked the xbox won't turn on. and i know the power brick works because i have a broken xenon motherboard that powers up with it. Im wondering if anybody can tell me what part/piece might be broken so i can replace it because i have a spare motherboard i can use for parts.