I work at a cell phone repair shop, I got this Samsung Note 3 That needed a sim reader replacement. I usually do soldering jobs pretty easily and i am considerably good at soldering. but while i was replacing the sim reader i heard what sounded to be a popping sound. after i finished the repair i went to turn the phone on and it would not charge, turn on, or give any sign of life. I had worked on a Note 3 prior to this and same exact thing happened. I heard the popping sound just the same. I scoured the board looking for any damaged components but i could not find any. The temperature i was using was about 415c my air was set to about 4-5.i did hold the heat gun in one area i moved around took the necessary precautions. Heat protective tape everything but something still happened and i have no idea what it is. If anybody has anything that might help it would be greatly appreciated,thank you!!!! btw i cant upload the images theyre too big illl find a place to put them in a bit.