Mac Mini Doesn't Power ON

While watching a movie, the mac mini suddenly switched OFF. I tried several times to turn it ON and tried different wall outlets but it doesn't turn ON.
Anyone knows what is this problem? does the mac mini have a power supply inside? and how to make sure it's not the adapter that was fried?

Since you posted in mini (2009), assume you have an Intel-based mini. Reset the SMC:
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Press and hold the power button for at least 5 seconds.
4. Release the power button.
5. Attach the computers power cable.
6. Press the power button to turn on the computer.
If there's not a more serious problem, that should take care of things.

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