New build turns on, then off, then on again??

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Joined
15 Jan 2011
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I built my first system about 6 weeks ago, which comprises of the following:

Asus P8H67-Evo motherboard
Intel 2500K
8GB Corsair XMS3 1333mhz RAM (2 x 4GB)
Corsair VX450 PSU
60GB OCZ SSD as OS drive

I added the following drives I had from my old PC which were wiped clean first:
500GB Western Digital as Media drive
250GB Samsung Spinpoint as Backup drive

Ever since I've built the PC, the first time I turn it on the mobo light comes on, the fans kick in and about a second later it all switches off again. After approximately 5 seconds or so, it then starts again on its own accord and kicks into life. If I restart it doesn't do it, only when its been shut down, and turned off for a while.

I've never experienced this behaviour before?? Should I be concerned my PSU or Mobo are faulty?

Today, I left the PC uploading some recent photos online. When I returned the system had frozen. I pressed the hard reset button (as nothing else would work) and when it restarted it came up with the "BootMGR is missing" error. I removed the SATA cables from all three HDD's. I replaced the SSD cable and tried again. It came on again as usual, so I replaced the other two SATA leads before restarting again. Its now back to normal and so I'm running a backup just in case its only a temporary thing.

Any suggestions as to what could have caused this freeze/bootMGR issue as well as the on/off/on problem would be greatly appreciated.

Many thanks!
 
sounds like the cold boot problem some ppl got with this board when it first came out.Have you updated the bios to the latest 1305 i think its at now.
 
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