ASUS P7P55D PRO not posting

[lilq94]

I'm not sure if it is the motherboards problem, all my components work for my asrock P55m PRO. It turns on, does not post, LED comes on and shuts down in like 5 seconds. There doesn't look like any damage on the motherboard. I bought it from ebay as used, I previously also bought a P7P55D-E PRO, and it does not work either but the board looked damaged.

 

[mosox]

Standard troubleshooting
http://www.tomshardware.co.uk/forum/261145-13-perform-steps-posting-boot-video-problems