[On then Off] Overheating?

Asus P5k-e motherboard
April 9, 2010 at 01:50:10
Specs: Window XP SP2, Intel Q6600 @ 2.40GH
CPU: Intel Q6600 @ 2.40GHz
Motherboard: Asus P5K-E/WiFi-AP
RAM: 2xOCZ PC2 6400 1Gb Dual CH
PSU: OCZ GameXStream 600W
GPU: NVidia XFX GeForce 8800 GTX


I have looked over the boards and seen quite a few cases of what I appear to be going through. I have an idea of what could be causing it, but a number of things don't seem to make sense, so I'll post my story and maybe someone can shed some light:

My computer has been up and running for quite some time, couple minor problems here and there, but nothing too crazy. I haven't made any hardware changes whatsosever in a while.

Today I was installing some software, and the installer decided to stall. Everything else was working, but I did a hard reboot because I couldn't end the process. I try to switch my computer back on after that, and my screen is blank. Leave it a few minutes try again, same deal. However, if I leave it to boot, everything is working (i.e .if I type my password in, I hear the Windows login sound), but just no graphics. I assume it is a problem with my graphics card, so I unplug, open up my case, and reseat the card.

I plug everything back in and hit the power button. Now, it turns on for a fraction of a second before turning off, then back on, etc. It keeps doing that until I hit the kill switch on the back of the PC. Even after doing that it still turns on then off one last time, until the green light on the mobo turns off.

I have since unplugged everything non-essential. The only things in it are the power cables and the CPU. I turn it on...still same deal. I fiddle with it a bit to make sure I didn't miss anything stupid (sticking power button, power cord on mobo loose, etc). Everything looks fine, but still nothing. I take a break and come back a little later. Hit the ON and suddenly it turns on...for about 10 seconds, then right back to the On-Off routine. I try it again 2 minutes later, not a whole lot change. I give it 15 minutes, and suddenly it turns on for a good 30 seconds, and then off.

No beeps. Nothing else. Does this sound like overheating? How could it be that it just suddenly decided to act like this, when not 3 hours ago it was working a treat? If it was an overheating problem you'd think I would have seen something dodgy in the last few months, but its been perfect.

So, what are my options? Does it look like overheating? Is this a matter of giving it some new arctic cooling thermogel, or is there something I am completely missing here?


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April 9, 2010 at 05:02:19
It sounds like failed PSU. Disconnect the 20/24 pin connector from the Mobo. Bend a paper clip in the shape of a U. Insert one end int the socket on the psu with a green wire, then insert the other end into any black wire hole. Power up the psu and see if the fans spin on the psu.

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April 9, 2010 at 18:49:43
I did that and there was no spinning, but I just assumed I was doing it incorrectly, since how would a PSU not work, when it powers up the case for at least a few seconds?

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April 9, 2010 at 19:00:07
PSU problems are numerous; things like not enough amperage on any of the rails (circuits) or not initalizing at the correct time (power good signal when the motherboard wants it).

Inexpensive psu testers are mostly worthless and the best psu test is to replace the questionable psu with a quality unit to see what happens.


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Related Solutions

April 9, 2010 at 21:16:31

It did turn out to be the PSU. I still find it odd that it lit the motherboard up and fans for a few seconds even though it was completely dead. A new one fixed the problem

Thanks for all your answers

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April 9, 2010 at 22:30:36
That's why we get the big bucks! ;-)

Glad you got it fixed...good job.


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