Hey guys, my mp08 failed to glow up as I wondered there was a malfunctioning on the led lighting system. I couldn't change a new one as I got this piece from ebay bidding and the seller simply couldn't offer any prove of purchase. Do I need to change the led lighting by myself? How to do it? I've tried to loosen the screws on the arm but I couldn't detach the arm from its shoulder. Is that any proper procedure to take the led out and change it?