Maximum PC

Today, i plugged in the hd audio from the case to the motherboard wrong by accident. I than started to smell this burning smoke from the computer i didn't mind it i thought i was just a shock. But after turning on the computer it would start but won't show the screen. After that i pulled out the plug from the psu to turn it off since doing a hard restart wont work. Now my computer wont turn on from the power button. It will only turn on if i plug in the psu cable. But when i plug in the psu cable the gpu and cpu fans would go at max speed and there will be a black screen. I tried changing the ram, finding if there are any broken ram slots, changing gpu but they didnt work. I think that the motherboard died since i tried the gpu on a different computer and it work. i also think that its my power button fried up. I heard the spark from the front pannel and i think that the power button is also fried up.

Specs
cpu: i7 920 c0 @ 2.66ghz
gpu: radeon 5770
psu: 520watt
Hdd: 500gb
mobo: Intel dx58so

New case or new start button switch...new motherboard...new psu. Gotta be careful plugin' in plugs in the right ports.

Nasty