i got this MSI Neo2 939 mb firday i stuffed my FX-53 in it and it ran fine all weekend long. i went to bed last night shut the system off and when i woke up the thing wouldnt turn on!!??

ive tried every trick i know and the thing will not turn on?? so i started thinking maybe my antec 550watt psu was the problem so i took that out of the system and tried a 300watt no name psu i use for my mach1 and the system would turn on but wouldnt boot (i gues the 300 watt just isnt enough?) so what i did was take the antec 550watt and used it to power everything except the atx plug wich i used the 300watt for and with the two psu's i was able to get the thing to boot and run. so my question is wtf is going on here? also the antec 550watt is back in my intel rig running the system at 4400mhz as i type this. so i know the antec hasnt gone bad...

anyone have simular problems? i know ive read a few threads with people having psu problems with this mb but i dont rember what they ended up doing to get it working again? should i rma the mb? just doesnt make sense that the psu was working fine then all of a sudden its not? now isnt there a power clean option in the psu? maybe the psu is detecting some type of problem and not letting the antec power up the mb? anyways i just wanted to get some input from you guys since im all out of ideas....

thx perc,