@kelana71 you can watch a disassembly and reassembly here: http://www.youtube.com/watch?v=zm4f2XjQL... and there's also an ifixit guide rear facing camera: Samsung Galaxy S4 Rear Facing Camera Replacement front facing camera: Samsung Galaxy S4 Front Facing Camera Replacement @oryana21 I agree with oldturkey03, if you're up for it, disassemble your phone to see what's really going on. If cleaning the parts doesn't work, maybe try replacing the screen and digitiser?
try sharepod! it's free and I've used to mass extract a lot of songs from my dad's ipod to his new iphone
maybe you should try replacing the charging port? Samsung Galaxy S4 USB Board Replacement