short cycle

hi,

i just built a system and it cycles on, and then immediately off.. cpu fan starts.. and stops... every 5 secs....

never gets to bios.

what component do you guys think it is...
 asus Pzh55-M Pro
intelogentAsked:
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dbruntonCommented:
Go back to basics and strip the board and rebuild.

I'd look at CPU not sitting correctly in socket.  Heatsink compound OK?  Heatsink sitting OK on CPU.  CPU fan attached correctly.  Power supply connected correctly to motherboard - may be a variety of sockets that power has to go into.
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nobusCommented:
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intelogentAuthor Commented:
stipped it down.. bare... bad MOBO...

thanks guys
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nobusCommented:
tx for feedback
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