Think motherboard blew need help!

ok so first part of this post is this http://www.tomshardware.com/forum/350163-33-think-blew (dont have to check it ill recapitulate)
it was posted earlier today when i tought it was the gpu that blew...

So lets recapitulate. my computer yesterday froze. i closed it... its powering back on but its not showing any display at all... my first guess was that my 260 gtx blew... turns out i was wrong since im back from the store with a brand new 6850 hd and no cigar... so im guessing my worse fear are reality and the fn mobo is chobo.

First of all, how can i rule out its not the cpu or any other component that is wasted... since there is no display at all and i dont have other computer able to take those component troubleshooting is reallly getting on my nerve...

what is weird is that everything seems to power on fine... fans on cpu and gpu are working... mother board light is on. and it seems its doing the same sound it was doing before when powering up... with one exeption.... when i power the pc on after a long time off. it restart about 30 second after and then power up again...

I doubt its the psu but i cant rule it out for sure.

Currently i have a Asus P5Q pro. my ram is some DDR2 and chip is an E8500 Wolfdale.

lets assume it is the motherboard who is out of service... what are my options. i dont really feel like changing my ram.. or my proccessor unless very nessecery. are there still motherboard wich support ddr2 that are widdely available? available enough that the store i go too would have them?

Please help im gowing berserk XD....

thank you

-ModestAxis