I have literally tried everything except for replacing the motherboard, so is that broken?

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53kyle1

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Jul 19, 2014
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I have a desktop PC with the following specs:

Asus PK5-V motherboard
Raidmax Hybrid 530w power supply
Intel core 2 quad 2.4 GHz q6600
4 GB RAM
ATI 5770 HD graphics card (XFX)
2x 200 GB IDE hard drives
300 GB SATA hard drive
5x case fans, stock intel CPU cooler

Before the following problem, I had gotten a new case, and I put everything from my computer into the new case. While I was at it, I thought I would swap out the power supply with a new one since any load would cause the old one to quit. Once it was put together, I turned it on and the CPU fan wasn't spinning at all. Luckily, since the case came from a family member, it also had a computer inside of it including a stock intel cooler which was a 775 socket just like the other one. I put it in and it spun up. I thought that maybe the old one was plugged in wrong. But, no matter what I did, it wouldn't spin up so I decided that since the old one was loud anyway, the intel cooler would be fine.

Now, here's the first problem. Upon turning the computer on, it would beep a few times then show an error about the CPU fan, and to press F1 to continue. I then googled this error and found that I should turn off Q-fan control on the CPU fan because it wasn't spinning fast enough. I did that but for some reason it wouldn't spin any faster. Unplugging the graphics card and switching to the integrated intel 950 graphics would make the fan spin at full speed.

Here's the more major and confusing problem. I can turn the computer on for a maximum of a couple of minutes, then it will shut off. Then if I hit the power button straight away, the fans will spin/light up, but almost instantly shut off. What I found was that if I wait 5 seconds and press the power button, it will stay on for about 5 seconds. If I wait 10 seconds, it will stay on for 10 seconds, etc. but never more than a couple of minutes.

The first thing I thought of was that maybe the new power supply was shot, but upon trying my old one, it still had the same problem. I then did the usual swapping out RAM sticks, unplugging the BIOS battery and waiting for half an hour to plug it in, etc. but got nowhere. I then decided that maybe the 530w wasn't enough and unplugged everything but the essentials and nothing worked.

I am COMPLETELY stumped. Could the power draw be too much for my power socket, maybe? I did notice that when I got the case, I wanted to see what specs the computer inside of it had, but it turned off similar to how it is now. Could the CPU or motherboard be shot? Or, could the stock cooler be enough to cause the computer to shut off like this? That came with the case too.

Before asking, yes the BIOS is updated, yes all of the drivers are updated, and yes windows is updated.
 
Solution
Ijack
It sounds like an overheating problem. As you didn't use new thermal compound that is almost certainly the problem. The first thing you need to do is to remove the fan again, thouroughly clean both surfaces and then use new thermal compound, following the correct procedures for you CPU. Only once you have fixed that obvious problem should you start looking for other causes.

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avenseth12

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Jun 9, 2012
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So a few questions that may help solve your problems:

Did you install the stock cpu cooler correctly?
Did you press down on all 4 corners of the cooler and ensure you wiped the cpu and fan of old thermal paste?
If so, did you put new thermal paste on the CPU?
Did you plug the cooler fan into the correct spot on the mobo? (Should plug into spot called cpu fan)

Next, did you install the motherboard standoffs into the new case in the correct spots? Did you ensure the mobo is sitting correctly on them so not to short the board out?
 
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53kyle1

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Thank's for the quick reply! I didn't wipe/replace the thermal paste, but I can load the hardware monitor in BIOS before it shuts off and temps seem perfectly fine. The CPU cooler was a bit hard to install, as the holes for the pushpins seemed a bit too small. Eventually all of the corners clicked in, but the cooler seemed a bit loosely attached. Again, the temps seemed fine, so I don't think that is an issue. Finally, yes, the motherboard is sitting correctly on the standoffs, although I had a screw left over from when I removed the old board.
 
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Ijack

Ijack

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It sounds like an overheating problem. As you didn't use new thermal compound that is almost certainly the problem. The first thing you need to do is to remove the fan again, thouroughly clean both surfaces and then use new thermal compound, following the correct procedures for you CPU. Only once you have fixed that obvious problem should you start looking for other causes.

 
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Solution
photonboy

photonboy

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Jun 20, 2006
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Since your problem occurred only after swapping the parts to a new case, I'm suspecting you somehow damaged the motherboard.

You've basically eliminated the Power Supply, and it's difficult to see how you could have screwed up the CPU or fan by simply moving the motherboard into a new case without reinstalling the CPU cooler (originally).

From what you replied with it sounds like it can crash even when you are just in the BIOS? If so, it's got nothing to do with Windows which I wouldn't have suspected anyway.

I don't see how it could be a BIOS setting since you didn't change anything there either. Again, you just moved parts originally.

You could try resetting the BIOS to Factory Defaults. Not sure what that would do. You can also try running MEMTEST www.memtest.org but I don't think it's a memory issue.
 
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53kyle1

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Alright, I think I'll buy some thermal compound and apply it, and HOPEFULLY the computer will work fine afterwards, although as I said, hardware monitor didn't report any abnormal temps :/
 
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Ijack

Ijack

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It certainly makes sense to start with the simplest, cheapest test and work your way up from there. In the end it may well be that your motherboard is damaged (although it's quite difficult to do that unless you handle it really carelessly), but it wouldn't be sensible to spend $100 to check that without trying other things first.

Lack of thermal compound is an obvious problem and is a common cause of computers shutting down. You are going to have to spend a few dollars on it anyway so try it first rather than assuming the worst.
 
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53kyle1

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Well I just checked hardware monitor again...it seems that I was getting the celsius and fahrenheit temps mixed up. Just to be sure, is 85 degrees overheating? I watched hardware monitor over like 10 seconds as it rose from 60 to 85 degrees celsius.
 
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53kyle1

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Jul 19, 2014
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OK...I won't know if the thermal compound fixes anything until in a couple of weeks, as I will be going on a vacation starting tomorrow. I decided that along with arctic silver 5, I would buy the coolermaster hyper 212 CPU fan. When I can get to it, do I need to wipe the thermal paste that comes with the cooler off, as well as the CPU? And, do I only apply the paste to the CPU, not the fan?
 
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avenseth12

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Yes, buy thermal compound, remove the heatsink and apply correctly. Hopefully you have not damaged your CPU by running it without thermal paste.
 
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