Well i got a corsair thx 650watt psu today to replace my old one that supposibly crapped out on me ages ago. Anyway it does work apart from the fact that it doesnt boot up my computer.
Here is what it does:
1.When i trick it into thinking that the motherboard is connected it runs the fans, hard drives ect with ease
2.When i try to turn it on using the start button on the case the fans and lights just flick on then straight again they flick off, well better then my last psu i get about a 100th of a second computer time!
So anyone come across this before or can point me to a link. I have also cleared the CMOS by removign the battery several times.