Tested everything, Comp still won't turn on

I have a new motherboard that was working with the stock heatsink. I installed the aftermarket heatsink and placed it in a case and it would not turn on. When I first apply power to the psu and press the power button, there is a 1/2 second buzz sound from the psu then nothing. If I press the bottton again, nothing happens at all. I have to unplug the psu before it will give the buzz sound again.
I have tried both boards on 2 different psus, and the psus were tested and good. Here is the list of what I have done. All of it was with the mobo, cpu, and ram only:

-tested power switch
-tested 2 separate psu
-tested power cord
-tested wall outlet
-everything is seated correctly
-cpu fan and case fan plugged in
-reset cmos
-removed boards and placed on non-conductive surface
-I have used the aftermarket heatsink before with no problems

Did I over-tighten the heat sink?
Was it killed by static?
Did it short out on the case? I have used this case before.
I also have the same problem with a older board.

The specs are:
Asus M4A88T-V EVO USB3
Phenom II 2x will not unlock
Kingston 4gb Ram
Thermaltake TR2 RX-550
Thermaltake TR2 430

Did you bend any pins on the CPU?

Do you have the PSU connected to the 8-pin EATX12V connector?...

You definitely didn't short it with the case provided you are using standoffs and a backplate

I had bent a pin on the cpu before, but I had it working so I just swapped heatsinks and cases and it wouldn't power up. I only have the 4pin power connector, but it had been working with that setup. This is the second board in a row that started this problem. The other one is an Asus M3A78 PRO.

Update:
I got the M4A88 to power on when I forgot to plug in the 4pin plug, so I'd try the same with the M3A78 and I imediatly got a lot of smoke in my face. I plugged the supply back into the M4A88 with the 4pin plugged in, and got the buzz sound psu and nothing else. Also, I think one of the supplies are dead.