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Computer reboots after shutdown

W

wrangler

2[H]4U
Joined
Jan 17, 2005
Messages
3,929
Gonna keep it short for now. Let me know if you have questions.
Motherboard is Rampage II Gene.

Yesterday: Perfectly working i7 920 system.
Today: Same system in a different case will not shut down. Well, it will shut down and then 5 seconds later it will magically boot itself up. Does it from OS or BIOS so I don't think it is a windows setting.

caveat... The new case has a different PSU and I installed a Kuhler 920 as the cooling system.

Things I've done and then tried shutting down.
Unplugged all drives.
Unplugged the Kuhler from USB leaving only the motherboard cpu fan lead attached.
Unplugged the power switch and reset switch lead from the motherboard.
Unplugged all attached USB devices.
Updated BIOS.
Went to regedit anyway and changed the powerdown command from 0 to 1 then back again.

So basically, all that was attached to the system at one point was the Kuhler 920 and the video card.
The case and power supply is this from the hotdeals section.
http://hardforum.com/showthread.php?p=1040275284&highlight=#post1040275284

What am I missing?
 
Thanks for the response

All BIOS options that could affect this issue are disabled including wake on lan.

I am really starting to suspect the PSU.
Now the fan is running really fast and loud.

It took me forever to put this thing together. I knew I had a good known working system that I was simple transferring into a new case so I really tool a long time hiding wires and making a good installation.

It is going to kill me if I have to tear this thing apart to rule out the PSU.
 
wrangler said:
It is going to kill me if I have to tear this thing apart to rule out the PSU.
Click to expand...
Who says you have to tear out that PC part? Just do what I do when I have to troubleshoot a PC that had a lot of cable management done: Remove the case side, unplug the PSU from the outlet, just disconnect the 24Pin, 8 Pin, and the PCI-E cables from the suspect PSU. Just leave those cables hanging and/or in the way for now. Then place the known working or new PSU alongside the case (preferably raised or on its side), connect that PSU's 24Pin, 8Pin and PCI-E cables to the system, plug that PSU to power outlet, and see if it works like normal then. That way, you don't have to potentially undo hours of work if the PSU is not the issue.
 
That's a good idea.
The only thing is I would have to remove the Kuhler 920 to get to the 8 pin 12v.
Hmmm.

Sounds like a project for tomorrow afternoon.

I'll update.

Update... my Surface Pro 2 arrived today so trouble shooting delayed till the weekend. :D
 
Last edited:
Ok
Got busy but finally decided to tackle this issue.

I took your advice and setup next to the other PSU. It's not the PSU.

So I take everything out of the case and build the system on top of the motherboard box.
I was loathe to undo the Kuhler 920 I had hooked up for cooling so I very carefully lifted it out complete and arranged everything so the cooler could stand up as well. No prob...
Power on. Power down. 3 secs later it boots right back up.

Now I'm stumped. I was sure I had a ground issue and even made a trip to the local Altex to get some nylon motherboard standoffs in anticipation of my findings.

So I'm scratching my head. Only thing left is the cooler. Can't be the cooler. So I unhook the USB connection that goes to the pump, which I had done before but what the heck. No difference. Sigh.

Slowly and with tears in my eyes I unscrew the pump from the motherboard, disconnect everything and then tackle the very fun job of getting that goddamned backplate off so I can pop on the stock cooler (never used btw). I get the stock cooler on, hit the button, power on, wait till I see the bios, power off and I'll be a son of a bitch. It's the goddamned Kuhler
:mad:
 
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