Okay guys I stupidly plug in a sandisk sansa usb cable into my Iphone. My iphone flashed several times on a white screen never turn on afterwards. I figure that I fried the mother board. After doing some research it seems that I fried my logic board. I have no problem buying one but I want to know if the communication board could have gotten damage also. Is there a way to test the communication board to make sure its still good? Also I have an 8GB model and would to change to a 16GB logic board.