IF YOU LIKE DROPPED YOUR PSP ONCE'S ON THE GROUND NOT HARD OR HIGH PLACE, JUST DROPPED, AND THEN MONTHS LATER IT STARTS ACTING UP,YOU WILL KNOW IF YOU HAVE THE STUCK KEY MODE,YOU WON'T BE ABLE 2 DO ANYTHING,THE KEY SIGN WILL APPEAR AND STAY.SO IF YOU LOOK AT THE RED SPOT THAT IS WHAT MAKES IT...