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Computer shuts down after 1-30 seconds

post #1 of 9
Thread Starter 
Hello. I am having an unknown problem. A bit of googling leads me to believe that it my problem may be a CPU or PSU problem. Since there isn't General Hardware help forum, I will be posting in both CPU and PSU forums.

First off, let me start with the problem;
When I turn on my computer it stays on for about 1-30 seconds.
Also, it appears that the longer my computer stays off, the longer it can stay on.

I have just enough time to check my bios. Here may be some important bits of information.
+5v: ~4.919V
+12v: ~12.239
CPU temperature: ~89
Case Temperature: ~30
CPU Fan speed: 1962 RMP

The moment my computer turned off and the heatsink fan stopped rotating I touched the heatsink and it is definitely NOT 89 degrees. As for the CPU itself, I am not sure.

What I am sure about though is that today, in fact just before it started doing this, i was cleaning out my computer with a vacuum. I had unplugged my Videocard and took out the heatsink to clean using a vacuum and a q-tip for those hard to reach places.

I did note that on the bottom of the heatsink, the thermal paste seemed to be dried up. To check if it was dry I gently and softly swiped it with my index then inspected my index to see if there was any paste on it; none!

I then put everything back together and this began happening. FYI; I did not ground myself but i figured i was okay, not sure if this is part of the problem. Please consider other things first.

As for my system specs:
**Processor: Intel Core i5-760
**Motherboard: Gigabyte P55-USB3
**Memory: Corsair XMS3 (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) x2 (8GB)
**Graphics Card: Gallaxy GeForce GTX 460 768MB
**Hard Drive: Hitachi 500GB, 7200RPM 16MB cache
**Power Supply: Thermaltake TR2 RX 750W
**Case: Antec 902
**Sound card: Creative Labs Sound Blaster X-Fi Xtreme audio
**Cooling: Stock

I would just take it down to the computer place and get it fixed but I am broke at the moment and I would like it fixed ASAP.

Thanks in advance!

PS: I am very good when it comes to hardware and hardware terms. I work much more with software, so please make as understandable as possible.
Edited by steak - 3/20/11 at 1:56pm
post #2 of 9
Your CPU is too hot.

Also, you shouldn't be repositioning the HSF without cleaning it off and reapplying TIM.
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mITX Build
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post #3 of 9
What you exept your CPU to run as hot as the surface of the sun without melting or shutting off?
Edited by topog_z - 3/20/11 at 2:04pm
post #4 of 9
Thread Starter 
Quote:
Originally Posted by thisischuck01 View Post
Your CPU is too hot.

Also, you shouldn't be repositioning the HSF without cleaning it off and reapplying TIM.
Thanks for the response, however what is TIM? I assume from the context your using it in you mean thermal paste. (Sorry i dunno too many abbreviations just yet)

Anyone else think of any other possibilities?
post #5 of 9
Your heatsink isn't on all the way? 86 C is way too hot.
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post #6 of 9
Quote:
Originally Posted by steak View Post
Thanks for the response, however what is TIM? I assume from the context your using it in you mean thermal paste. (Sorry i dunno too many abbreviations just yet)

Anyone else think of any other possibilities?
TIM: Thermal Interface Material (so basically thermal paste).

Here's what you should do:
1. Grab a tube of Arctic Silver 5 from a local electronics/computer repair shop for $5.
2. Clean off the CPU/HSF base with isopropyl alcohol. You want absolutely no residue from the previous application of TIM.
3. Apply a drop of TIM to the center of the CPU (about the size of a grain of rice).
4. Remount the HSF.

And I can not stress this enough:
DO NOT TOUCH THE BASE OF THE HSF OR YOUR CPU.
Edited by thisischuck01 - 3/20/11 at 2:11pm
mITX Build
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Dell UltraSharp (U2412M) Ducky Shine II (DK9008S2) SeaSonic Platinum (1000w) CaseLabs Mercury S3 
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mITX Build
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CPUMotherboardGraphicsRAM
Intel Core i5-4670K Asus Maximus VI Impact EVGA GTX 680 SuperClocked G.Skill Trident X Series 
Hard DriveHard DriveHard DriveOS
Samsung 840 Pro Western Digital Black (WD4001FZEX) Seagate Barracuda (ST2000DM001) Windows 7 Ultimate 
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Dell UltraSharp (U2412M) Ducky Shine II (DK9008S2) SeaSonic Platinum (1000w) CaseLabs Mercury S3 
Mouse PadAudioOther
Razer Scarab KRK Rokit G2 (RP6G2) Logitech C920 HD Pro Webcam 
CPUMotherboardGraphicsRAM
AMD Athlon II X2 250 Gigabyte GA-MA785GMT-UD2H ATI Radeon HD 4200 (Onboard) 2GB Kingston ValueRAM DDR3 1333Mhz 
Optical DriveOSPowerCase
LITE-ON 24X iHAS424-9 Windows 7 Ultimate x32 Antec BP550 Plus Rosewill R101-P-BK 
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post #7 of 9
Quote:
Originally Posted by steak View Post
Thanks for the response, however what is TIM? I assume from the context your using it in you mean thermal paste. (Sorry i dunno too many abbreviations just yet)

Anyone else think of any other possibilities?
they are pretty much the only things it could be.
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Prometheus
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by Limes View Post
Your heatsink isn't on all the way? 86 C is way too hot.
Thank you very much Limes. This was the problems, when I was reinstalling the HSF I had not pushed the knobs in enough. I pushed them in more and now the computer has stayed on for about 5 minutes. +Rep to you and to thisischuck who also offered possible sources of the problem.

I will still be picking some TIM up at the store when I get the chance and will be reapplying. Thank you
Edited by steak - 3/20/11 at 2:22pm
post #9 of 9
Yeah, as previous posters have pointed out it's most probably the CPU heatsink not securely sat. Re mount the heatsink.
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