Either buy a New LCD or you jumped your backlight, or you maybe have to reseat the connections with your spudger.

HELLO scott,i've seen people HARD RESET the phone,like doing the ideas i got below. Here's what i want you to do. Take out the battery and then wait ten seconds then put the battery back in and plug it in for one second to turn it on then it should work. Taking out the battery can be hard. A special tool is needed to remove the back. Once that is complete use a small screw driver,perhaps a phillips to remove the cable to the battery. NOTE:my iPhone 3G is actually going,although i blackra1n'd it,and it is AMAZINGLY going!