Help with build that won't poweron

[Warthog32]

I'm building a new system with:

GigaByte GA-Q87M-MK
Intel i5-4570S Haswell
SeaSonic Platinum Series SS-400FL2
G.SKILL Ripjaws 32GB (4x8GB) F3-2400C11Q-32GAB

However, after assembling, when powering on the first time, I heard a loud POP, and nothing powers on. Nothing ever displays on my monitor, and no sounds.

Plugged into a watt-meter, the power supply is drawing power - around 5 watts, and when I hit the power on switch, it briefly raises to 20 watts for maybe a second, goes down to 0 watts, and then goes back to 5 watts. Otherwise, nothing happens - no activity on my display, no sounds, etc.

The MB doesn't seem to have any sort of LED display for troubleshooting codes, or troubleshooting mechanism -- the documentation doesn't say anything for troubleshooting tips. I see a "DEBUG header", but no idea what I should plug in there -- can anyone explain how to use that?

How can I troubleshoot this? Any tips?

 

[Ketchup]

Sounds like the power supply went bye bye. Does the fan on the power supply spin?

 

[Warthog32]

I was thinking the same - although the fact it seems to sort of draw power until the power switch activates seems like it's at least partly operational.

The fan on the power supply doesn't spin - but it looks like this power supply is a sort of quiet design that doesn't spin the fan until it self-determines it needs to, so I'm not sure if that's necessarily a bad sign.

I guess I'll rip it all out and try to bench test with another power supply.. really didn't want to go buy a second or rip up my other computers, but seems like that's my only option really.