360s powers on then off red light on psu
So here is the story: I repair rrod xbox consoles so my friend thought he would buy a cheap 360s on ebay (warranty seal broken) that was broken and have me fix it. The problem is that when i try to power on the xbox it chimes, turns off, and the light on the brick is red. The power brick powers up the halo reach 360s that i own so the problem is not the psu. I have checked all of the usb ports to make sure nothing is shorting out. I have also taken the mobo out of the chassis and all the solder connections look fine. I was looking around the web and some people were reporting that this could be due to a bad mosfet. I was wondering if this was true and if it is how i would go about testing the mosfets figure out which one is bad. Also if any one has and other ideas feel free to share them.
Thanks and sorry for the long description,
From what I know of, bad MOSFETs were a problem on "fat" Xbox 360's, not the slims. The power supply turning red is a sign of a short somewhere on the motherboard. Look around for broken traces, or anything else out of the ordinary. If you want to test the MOSFETs, use a voltage meter, and place one prong on a ground point somewhere on the board (Such as the metal shielding around one of the I/O ports) and place one prong on "drain" rail of the MOSFET that you want to test. (Shown In This Picture, you can also use the metal tab on the end, if you wish) With the console powered on, start by testing the MOSFETs closest to the power connector on the motherboard, and work your way away from it, until you find the MOSFET that isn't working. A working MOSFET will read +/-3.3-24V on the volt meter. A dead one will show no voltage at all.