GA-Z77-D3H won't shutdown or boot properly

[t1m3lapse]

Hi.

So I built the following computer for a friend...
Gigabyte GA-Z77-D3H
i5 3570
Samsung 840 Series 120GB
Kingston HyperX 8GB
Silverstone Strider Plus 600W
Corsair 200R
W7 Pro 64 Bit.

Everything seemed fine when I set it up at his place. He then told me that he was having problems shutting down and turning on the pc, so I told him to bring it back to my place so I could check it out.

I realised that I had put the PWR front panel connector on the wrong way and I thought this must be causing the problems. No, not that easy.

So after fixing this, I noticed that when the computer was shut down, the PWR led and all the case/cpu fans would stay on like it's in standby. I could then sometimes hit the PWR again and it would turn off (other times this wouldn't work and I'd have to flick the PSU switch). After that, when I went to turn the computer back on nothing would happen. I then had to unplug the PSU and wait a few minutes before trying again, then it boots.

So I thought it might be a BIOS bug, so I tried updating the BIOS, but when the Q-flash tries to do a power cycle, it just turns off and stays off. I also tried resetting the CMOS, but still no luck.

So if this is something that an updated BIOS can fix, is there someway so make sure it finishes the flash?

I figure otherwise that either there is some windows or bios setting that I've missed that I need to change (strange to be on by default) or get an RMA.

It's just a mystery as the computer once it's on works fine, and I really would like to avoid an RMA if possible. Can anyone offer any advice on what to try 1st??

Thanks

 

[Ketchup]

Are you referring to the connector for the power LED on the case, or something else? I have seen things like this happen when a "bad" or shorted device in plugged into the power supply.

Beside the components listed, what else is getting power from the power supply (USB adapters and devices, fan controllers, etc)?

Also, what version of Windows? (although this doesn't sound like something that would relate to the OS at all)

 

[t1m3lapse]

Are you referring to the connector for the power LED on the case, or something else?

I'm referring to the "Power SW" that was plugged in the wrong way. I'm just saying the LED on the front and all the fans stay on when I shutdown.

Beside the components listed, what else is getting power from the power supply (USB adapters and devices, fan controllers, etc)?

No only the components listed except there is a 2tb seagate storage drive that I didn't mention.

Also, what version of Windows? (although this doesn't sound like something that would relate to the OS at all)

Windows 7 Pro 64Bit.


I guess the fundamental thing that is confusing me is the idea that an RMA might be the only answer. I've played through some BIOS settings and disabled all power saving/sleep settings in windows, with no luck. I'm stumped. I think tonight I'm going to pull everything out and put it back together again and see if that helps. Everything I've tried so far has been BIOS/software related.

 

[Ketchup]

Don't discount the ports on the case that you connected to the board. If you get a chance, I would unplug those and test those before doing a full tear down.