Please help support the site by donating at the link below.https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=8ZRU34U47BESW
Maybe the backlight tab broke, and the mobo is not secured. When you put the umd in, it pushes the switch on mobo, making it move. WHen it moves, the backlight cable moves out of the thing, and it turns backlight off? Idk maybe.