Automatic shut down

[Michael]

I received an old CPU from a friend, which is functioning well except a noisy CPU fan.
So I took out the fan (with heat sink) and clean it up, and put it back.
Now, when I start the computer, it'll turn off in about 5 seconds without any beep code.
Any idea?

[patio]

Sounds like Thermal paste was not applied properly...

Clik Here...