okay, so i reflowed my friends xbox for him using a heatgun. after i reflowed it and let it cool for about 35 minutes, i plugged it in and it worked. so i put the heatsinks back on and everything else, and put it back into the metal casing. when i plugged it in it wont turn on at all!!?? i took it all out and took everything off and it wont even show any lights when i try to turn it on. the power brick is fine, & the board isnt flexed? whats wrong? it worked fine, then once i put it in the metal casing with everything, did it just get fried all of a sudden?? please help!!!