MSI Neo 2 plat w/ amd64 3200+ win will no longer post , need help plz.

Question

Koolance watercooling case
enermax 431w ps
Msi neo2 plat with updated bios cant remember what version but i had to flash it as soon as i took it out of the box to be able to use sata raid trouble free.
amd 64 3200+ winchster 2ghz  @ 2.6ghz 
1gig (2x512) crosiar twinx DDR500 3.4.4.8
dual 36gig wd raptors in raid 0
sapphire x800xt
sb audigy 2
3 optical drives
floppy drive
6 80mm fans
System has been pretty much solid since i built it back in Dec 2005, The Power supply i've had for 1-2 years, last few months i would start up my pc and then at random between 15 secs or 30 mins the pc would just shut off, and sometimes it wouldn't do it at all. I didn't really think nothing of it. About a month ago i was about to play WoW (world of warcraft) and my pc glitched out and the sound screeched and then i shut it down, i reset the comp and no post, i then reset the cmos the pc then posted and i changed my bios settings back and i was up and running again. I could run any games, half life 2, quake 4, WoW and they all ran great i still got the random shut downs if it did shut down when i restarted it , it would shut down again. (odd) Tonight i was on chatting with some friends and was about to play some counter strike then changed my mind and i started up WoW everything loaded up great, got into the game and played for about 2 mins then my screen went black and the sound screeched, the monitor had no signal and my pc was still running, so i turn the thing off and reboot, no post and no beep code. I proceeded to reset cmos and reboot still nothing i checked the D-bug thing and i was getting a processor intialize error, so i thought i fried my cpu, i took off the waterblock and pulled out the cpu cleaned it up reapplied AS5 and then re-seated the cpu, tried to boot and nothing, i then started to pull ram out and swap slots and single the sticks out and that did nothing. I then stripped my pc down to barebones reset cmos and used beap codes, with just cpu seated i got a ram error code, put in a stick of ram then i got a video card error code put in the vid card then i was back where i started, no beep code and the d-bug thing was hanging on processor initialization. It could be my cpu although in my other comp i swapped cpu, i put the enermax 431w into the other comp nf2 w/ amd 2500 barton and it posted and ran fine, although when i used the ps from the other system in the one thats not posting it would post either but it was only a 300w ps. I don't believe its the cpu, the 20pin connector on the power supply has about 4 pins where the pastic shell has browned from heat or something, so i should replace the ps regardless but i'm not positive thats whats causing my issue. Anyone with any suggestions i'll pretty much try anything at this point.
Thanks for taking the time to read through my problem.

Answer 1

Quote
the 20pin connector on the power supply has about 4 pins where the pastic shell has browned from heat or something
This is not a good sign, this could be an indication of to much amp being drawed.
This could be due to a poor connection on the P/S connector or the connector of the MB or it could be due to a device like your CPU, ram, graphic card or so on drawing to much amps.
Check the MB for any signs of swelled, leaking or bursted caps, also look around the MB P/S connector for any resistors that have changed colors or are burnt.