iPhone 3G turning on, but screen blank and not responding! Help, please?

Jeebus

Hey guys,
(There's a tl;dr at the bottom for those in a rush).

I dropped my iPhone, cracked the screen and LCD, replaced both, as well as the inner plastic bezel holding them together. Now, the LCD doesnt turn on and the touch screen will not respond. The backlight wont even turn on !

It is still on, responds when I plug it into USB, it still vibrates and has its files and will be picked up by iTunes.

And the kicker is that it was working for a few seconds, when I first put everything together, I just took it apart to get the home button to be seated properly, and bam, all of a sudden everything stops working.

Frustrating indeed ! Would anyone be able to help me out please ? I am sick that it seems I will have to buy another part, but, if it will fix it then it's worth it !

tl;dr :Replaced iPhone LCD, glass and central plastic piece. iPhone screen worked for a few minutes, then stopped. Now, screen will not work but phone will respond to USB and when I flick the switch to put it in silent. Can anyone help please ?

Thank you all very much !

If you cant help can anyone recommend somewhere I could send it to be fixed ?

Jeebus

Changed the digitizer...no response !

Edit : Oh it wasnt the digitizer...it was the part no.3. The detachable part from the plastic bezel in the centre !

Jeebus

Desperate bamp !

Jeebus

Feck