Don't be too quick to cast off the mobo as dead if it dosen't seem to work with another cpu. A friend fried his XP a few weeks ago cause he pulled the cpu fan plug off when installing a new HDD. The board seemed dead as well, it wouldn't beep, post or even power on the fans when we tried it that day. After letting it sit for a couple days out of the case with the battery out of it, we dropped in a cpu and gave it a try. Bingo it booted right up, it's still in use just like it never happend. Check the manual that came with the mobo for beep codes or check the website of the maker.
this is something that may or may not have anything to do with your post, but it just happened to me on tuesday. I had a T-bird 1200 200mhz cpu that I had hard modded to a 9 multiplier so I could run it at 133 mhz on a K7S5A board without multiplier settings. It worked great for about 4-5 months then 1 day it quit, would not do anything, I tried it in another board same results. So I tossed it in a drawer and bought a new cpu. I pulled it out on tuesday night and cleaned up the ASll and rear window repair paint on it, I was going to hang it up or drill it for a key chain, I had a mobo with PSU and ram sitting on the bench, so I gave it one more try..it worked. After 3 months of being dead it suddenly worked, not in the same mobo, but the same model mobo....very strange indeed. I had tried this cpu in 2 other mobos at different times in the last 3 months cause I just couldn't believe that it had died like it did....
If you can RMA then do it, if not don't toss the stuff out just yet, give it a while and try again......maybe you will get lucky.