"Replace my Touch screen, but still get the white screen only!"に関する回答I've fixed a few of these and it sounds most likely that you will need to replace the LCD screen. However there is no harm in checking over the connection and doing a hard reset first. If its still not working you can find get an iPhone 3G Screen Replacement and this will fix your issue.
"iPhone 5 replacement screen"に関する回答Glad to hear I'm not the only one to damage the iPhone 5 so quickly!! I got my screen on Saturday from RepairsUniverse here - iPhone 5 Screen. It arrived yesterday and my iPhone is now like new again. Got the case too so hopefully it will last longer 2nd time round :)