Is my iPhone completely dead?
I recently had my iPhone in my pocket on a very hot day with rain pants over top. My body heat was really high that day and when I finally got a chance to take the rain pants off my phone was almost too hot to touch.
The screen flashed white when you pressed the power or home button at first, but now it does nothing unless you try and reset it by holding the home+power button. When you do that it flashes grey for a minute and then goes back to black.
It also will not charge or be recognized by iTunes, nor will it vibrate when switched to silent.
Logic board fried?