Apple ipod

How I can know if my iphone is broken LCD? I took him aside and there were no bubbles in the .. LCD?

There were bubbles as described in online tutorial. Therefore, I am convinced that it is the LCD screen. I can hear the screen still works, but all I can see is a white screen.

A white waste could be a software problem: http://ipod.about.com/od/iphonetroubleshooting/qt/iphone-white-screen-fix.htm Hope this helps.

iPhone 3G LCD Replacement Directions by DirectFix.com