iPod Touch 4th Generation Blank Screen

He in the picture pointed out by the screw drivers are first the battery terminal you want to ground and second the dock connector metal you want to ground against

Now touch battery terminal 3 and the dock connector metal with the metal part of a screw driver togeather this in turn should short the battery and get ipod back to life

Now when you reattach the screen get your wall charger and turn it on and plug into device.. Now you should see the apple sign