So my power supply Red dotted today after making a really funky noise which sounded like a fan grinding against a wall. i've tried everything turning it off unplugging all the seperate cords and plugging them back in, but it just goes back to red dot after about 5-10 minutes of being on. am i gonna have to get a new power supply? (for the slim's btw i have the halo reach model.) i've already checked all over for one, gamestop (they only sell old model supply's) microsoft AND here... any suggestions?!