Default Hardware Repairs in North America? / IC Chip

Hi,

Anyone know where I can get the IC Chip in my Galaxy S3 (i747) repaired in North America

It sounds like the IC chip needs to be replaced.

Beyond going through Samsung (and paying...more than the phone is worth, to have it fixed)

does anyone know if any repair shops in North America do this (I would mail them my device)??

I've seen youtube tutorials of people replacing/fixing the IC Chip and you can buy it on ebay (it requires soldering and a heat gun to fix) so clearly people are doing this themselves.