You may have pinched the Reset/Eject, or it may still not be seated correctly. Also check the little PCB the white, 5 stranded cable connects to. I had a PS2 which was doing what yours is, I stripped back the wire and re-soldered and viola! A perfectly working PS2. Btw, I got my V5 going if anyone was wondering... It was a loose Reset/Eject cable, DOH!