I just bought a PSP off Ebay. It has 1.5 Firmware on it. I turned it on and it worked. so I went and bought GTA Liberty Cities. I got home went to play it and now my PSP when I turn it on just the green light stays on until I take the battery out. I have no screen. Ive tried plugging it in to the wall. Same thing. Tried without battery same thing. I tried plugging it into my PC and my pc does not see it. Any suggestions?