I have the strangest problem that I can find on any forum.
My 360 when you turn it on does the blink 4 xbox lights, then the fan kicks up to turbo speed, and the xbox shuts off with 2 red lights on the left. This all happen within 10 seconds.
Things I'm done to try to fix it:
thermal paste
X-clamp
I even left it alone overnight, came back, start it up, and same crap high speed fan off in 10 seconds.
what the hell it can't over heat that quick!