TheDude935
This past summer I had Upgraded my computer to the following:
 
EVGA X99 FTW K
2x EVGA 1080 FTW in SLI
EVGA 1000 PS PSU
(4x8GB) Ripsaw 4 DDR4 Ram
Intel 5930K CPU
Cooler Master HAF X Case
Western Digital 1TB hard drive (from my old build)
 
Running at stock specs, the computer ran perfectly fine for roughly 3 months without issue, then in October it would not boot up at all from either the case or mobo power buttons. I initially thought its was a PSU issue, so I had that RMA'd. The computer did end up turning on after it was replaced, but it did not solve the problem as any time the computer went into sleep mode or was shut off I could not get it to turn back on using either the case or mobo power buttons. The only solution I did find to get the computer to turn on was once the computer was turned off or in sleep mode turn off the PSU and wait an hour or 2 before turning the PSU back on and powering up the computer. EVGA tech support then decided that the mobo should be RMA'd. The replacement mobo ended up doing the exact same thing, so I took my computer to a repair shop where its been bench tested, GPU's, RAM and CPU swapped and tested, yet the mobo would just not power on consistently. The shop recommended I RMA that mobo as well. Now I'm on my 3rd mobo and the issue still persists. The tech at the shop believes there is a defect with the power button. Has anyone else had this issue or any recommendations because I'm at a complete loss and I just want a working computer.
 
Thanks

EVGATech_GarrettL
Have seen that some PSUs will trip a fail safe (sometimes from detecting an actual power issue, sometimes it is a false positive reading) but this will not reset until the power is fully drained from there unit; and this sometimes takes 10 minutes to a few hours. 
 
If you try the jumper test once the unit shuts down, before you disconnect the AC power, you might be able to replicate the issue. I do find it strange that the shop didn't swap out the PSU though when testing the system. You might want to verify that this was done since it should easily rule out one component or the other.
 
I don't know if bench testing it is completely necessary since you mentioned that it does work normally until you shut it down or put it to sleep (at least that's how I read it)

EVGATech_GarrettL
This isn't unusual from what I've seen, though 30 seconds seems a bit longer than I would expect. The x58 FTW3 I use takes about that long, but my Micro2 is usually closer to 15-20 seconds (I haven't actually timed it precisely); I have never had any issues with it not booting outside of this.
 
Hopefully this is only limited to cold boots and hard restarts since I can't imagine having to wait 30 seconds every time I adjusted something in the BIOS (the overclocking nightmares....) 
 
Let us know what the tech says about his testing so we can all see what was going on 

EVGATech_GarrettL

HeavyHemi
 
I'd say a board that requires you wait 30 seconds after shutting it down prior to attempting a cold start is highly unusual.  I wonder is there is a short in one of the connectors on the case. Power button, reset audio...USB. Something isn't right based on it occurring on more than one board.

That FTW3 is old and I have 5 different mismatched DIMMs  in it so I expect that Frankenboard to be slow, but I do agree that 30 seconds is a long time 
 
Idk if he's actually bench tested it, but he did mention swapping cases so I would expect that to rule out some of that stuff.

Sajin
I'd be trying a completely different board at this point.

TheDude935

HeavyHemi

Sajin
I'd be trying a completely different board at this point.

Strange issue. The odds of three boards exhibiting the same identical error mode, astronomical given this is the only report I've seen of this particular error. I have the same board. This is something in common with all three board assemblies that is causing this issue. Which is why I would take it down to the bare essentials of CPU and power. Then keep adding hardware until you can replicate the issue.

I was able to replicate the issue with virtually nothing plugged in. I'm thinking there is a flaw in the batch of MOBO's because all the MOBO's I've recieved the serial number's weren't too far off from each other and we've literally tested everything that could be tested

HeavyHemi

Sajin
I highly doubt this is cpu related if the OP is able to use the computer all day without any problems.

Well, do you doubt it more than three motherboards having the exact same cold boot issue? We are down to only a few common items being in play. If he takes the board down to just power and CPU, what else is left? I've actually had an issue similar to this where it was the CPU causing a 'double pump' during a cold boot. It ran perfectly fine other than that. These unusual problems always boil down to a process of elimination.