My pc turns on and then turns off ina half second

[mei62150]

hi i have a pc that the past week stop working, one day i left the computer in sleep mode and then the next day i didnt turn on for nothing
but when i turn the switch off and back on it will light up for a half second and turns off, so i figure my ps went out so i bought a new one from frys a antec 750w put in and nothing so i decided to take the cpu off and i noticed there were like blackesh right next to the cpu well where it sits on the motherboard so here are ther specs
-asus crosshair 4 formula
-phenom six core-
-750 ultra ps and the antec that i bought
-6gig of ozx something ram
-hd radeon 6770 gpu
-coolmaster cooler with two fans on the sides
ima continue to troubleshoot it
so let me know if any ideas might help

 

[rolli59]

Can you see where the black stuff came from looks like a bad motherboard.

 

[vitornob]

Last time it happened here I did burn the motherboard.

 

[mei62150]

yea it might be the motherboard tomorrow ima go get a crosshair 5 extrme motherboard

 

[mei62150]

ill let u guys know the results tomorrow

 

[mei62150]

@rolli it came from aside of the cpu ill try to post a pic for it

 

[rolli59]

so is it a burn mark or some kind of sticky stuff?

 

[mei62150]

no its like brown and blck combine but so i got a hold of some parts and test them out so i took my phenom cpu and put it in the other mb and it boot just fine
i tried everything else before i purchase a new crosshair but this V not IV is ther something i should try
and again thanks for the help