Can't post new build

[w84u2cy]

Hey,

I've just built a new system in the S340 case. I can't seem to get it to post though. When I switch on the system the CPU cooler LEDs flash for a second but the power switch doesn't work. I've checked the switch connectors but I can't find a problem.
Any ideas?


Thanks

Edit: the fans seem to move a tiny bit when the power button is pushed.

 

[jsmithepa]

Often oooops: 24 pin power connector not seated all the way down, and builders forget to plug in the extended 4/8 pin 12v power connector.

Reset CMOS.

After that, do what pro builders do, the breadboard thing, boot Bare Mobo outside the case with minimum/no components.