[SOLVED] Help! I wanna know for sure if my MOBO is dead

Hi! i just made my new around here so i hope im not too much of a bother..

The thing is I've spent alot of time surfing the web for possible ways on how to tell if my MOBO really (hope not) dead.

scenario: im trying to rebuild my PC that was left for almost a year now in my closet. after i put things together and making sure all the components are on its right place, i decided to give it a try and there was my problem, at first i was happy because it powers on, the motherboard has a power and reset led lit onboard and all is working fine,case fans,HSF,HDD,Optical drives) then suddenly after 5-6 seconds it restarts without even reaching or atleast showing the bios (nothing on my monitor). although it powers up again, and good it didnt restart this time, it wont show me anything on my monitor.

tried to do the necessary troubleshooting but still had no luck, it will power on, after 5-6 secs it will restarts, power on again, its just like stated above. it looks like a sleeping PC, power is on but it has NO beeps, no post, no nothing.

test: Bareboned it, removed the peripherals, cleared the CMOS, jumpers, replace battery, shorted my PSU to test it in case it was bad but was working (i voltage test it too), on

and so i came up with the conclusion that maybe perhaps maybe my MOBO is dead on its knees.

here is my components:
intel core 2 quad q6600 G0 Stepping B
Asus P5Q-E (Bios 2101)
Corsair H100 Cooler ------> (newly purchased)
Patriot Signature PC2-6400 800mhz 4GB
Sapphire Radeon HD 5870 1 GB------> (also new)
500 GB Seagate Barracuda HDD
Epsilon 600W PSU.

Please, can someone tell me, what went wrong.