Sons itouch 4g screen was broken when another child swatted it out of his hand.
First pass not so good. The white screen wouldn't clear on the hard reset. I thought that I mis wired something. Unfortunately I already attached the glue to seal it. While removing it I cracked the new lcd.
Luckily iFixIt sent me a replacement!!!!!
Don't attach glue tape until the device powers up correctly.
If you get the white screen attach to itunes and restore it that will fix the problem!!!