Hi, I just fixed up my IPhone after getting the black screen of death. After that, I try'd plugging it into my computer, and it will not show up.. Although, when I plug it into my wall charger, it works. But after a minute or so, it'll crash. Turn off, everything. Yes I have try'd holding the power button and home. Also, holding the home button when plugging into comuter. Didn't work.. Won't show up on Itunes. Any help?