Answer to: white haze around screendid you get your screen from China? Its the digitizer. Appears to be "side lit" not "back lit" if you order another screen (usually happens with the color screens.
Answer to: iFixit LCD Vs. eBay LCD (iPhone 4s)I use replacements from sunsky-online.com I have never had an issue and they are $30. Heck if they dont work you could buy 4 screens for ifixit price
Answer to: Why is my iPhone working but the screen is black?The ribbon cable may have been compromised on the digitizer. I had the same issue and replaced the screen with a different on and worked meaning the problem lies with the digitizer or front display assembly