Maybe it's the 5volt pin problem, also I have a problem that my Xbox keeps giving me the 3 flashing rings, it is not overheated, is it because the atx power supply I use is just cheap? Also whenever I stop the atx power supply fan, and keep it running, it works fine, so what is it, also could a 12 volt and 5volt 2amp power brick work, I tried it but it gives me the red flashing rings, pls help