Larry <noone@home.com> wrote:

> http://s1.guide-images.ifixit.com/igi/hsa3HpY6I2UNWjYJ
>
> Bring up this big picture and magnify it by clicking on it.
>
> Look in the upper right area and you'll see a light green RF
> submodule to the right of the Sky chip. Look closely at the green
> submodule. See where it has turned brown in a brand new phone?
> Those chips get HOT!
>
> Now look between the light green module and the chip below it
> marked: 338S0353. Why is the board BURNED out from under this IC?

If you really want to know... Try asking in the very active
(sci.electronics.design) or another electronics group.