Ok I just want to be clear.
1. I dropped my PSP from about 6 feet.
2. It turns on, but displays nothing, not even a light, has no sound, UMD drive makes absolutely no noise with a game or movie in it, and it will not turn off without holding the power button up for a few seconds or removing the battery.
4. dr2real- are these the same symptoms you have?
5. Crossing- are these are the symptoms you had for your PSP and it was bricked?
So I may possibly just have a bricked PSP and I may be able to recover with a pandora batt? This brings me hope.

I was considering trying the pandora method anyway as a last ditch effort. But my PSP does not have CFW.