PC shuts down and restarts with no display output.

Feb 15, 2018
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Hey guys,
I’ve recently built a gaming PC and upon booting it it shuts down after about 15 seconds with no display output. After the reboot the PC stays on but still not display output.
Specs:
Gtx 660
Core i7
Msi B85-G43 motherboard
8gb ram
Antec 500w
Any help would be greatly appreciated.
Thanks