My newly built pc won’t post

[123chickenslol]

I put my whole pc together, and it turns on. The fans turn on, everything looks as if it will post, and then the pc loses power and restarts the cycle. There is an audible click when it fails, and I do not know what it is coming from. Any ideas?!?

 

[M04D18]

check this thread : http://www.tomshardware.co.uk/forum/261145-31-perform-steps-posting-post-boot-video-problems

 

[rgd1101]

what is the full system spec?