Hey guys i really need help because this is a customers phone. I have a galaxy s3 i747 att version that i change the charger port with a heat gun. After i finished i clean the motherboard really really good with alcohol (91% which works good on other phones) and now the phone wont come on. I dont think i overheated the phone and i wrapped aluminum foil around the whole motherboard. Can some one please help? I also tried another battery and leaving it plugged in but nothing. the computer wont even read it. Any advice would help.