PC IS Looping Again and Again

Heloo Everybody... Yesterday I was Playing Game on My PC And suddenly My PC Display All Colourful Dots appeared So I Restarted By Pressing My restart button.. But my PC doesnt turn On.. I unpluged everything and drain all power Since nothing had happend... When I turn on my PC The Light Around power button Appears and after few seconds It Restarts again and again..
I had check All Thing but nothing help.... Can Anybody helped.. Please.
My CPU Doesn't start... The Monitor display and Key board all are blanck... Only Mouse Light Appears but the light under the mouse doesn't Appear
 
1) How old is your system? 2) What is the make and model of your power supply? Without being able to see it it sure sounds like your power supply is the culprit.
 
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