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86 posts

Master Geek


#48437 14-Nov-2009 08:30
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Me and a friend just finished building my computer. But when you turn it on after about 20-25 seconds it turns itself off. It doesnt matter if your in the bios, booting from a cd or just booting from the harddrive it still turns itself off after 20-25 seconds.

The switch on my PSU is jammed and wont let me switch it to the off postion, so im guessing it might of been dropped before i got it. So that might be the problem but i wanted to check to see if anyone else had any ideas.


my computer specs

HardDrive- SeaGate 500gb

Ram- 4gb -2X2gb Kingston HyperX 1066 Ghz

Processor- Intel Core 2 Quad Q6600 2.4Ghz

Graphics card- Galaxy Geforce GTX 260+

MotherBoard- XFX Nforce 780i

Computer Case- Antec 902 mid tower

Power Supply- Antec EarthWatt 650W

thanks

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xpd

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  #272943 14-Nov-2009 08:39
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Do you see the BIOS screen ? if all appears to be working fine before it shuts down, Id suspect overheating.
Ensure the heatsink clips are clipped in properly - add some thermal paste to the CPU/HS.




XPD / Gavin / DemiseNZ

 

 




86 posts

Master Geek


  #272968 14-Nov-2009 10:50
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DITnow sometimes my computer sometimes turns off after just a couple of seconds but mostly it turns off after 20-25 seconds

If my computer stays on for 20-25 seconds i can get to the bios and boot from a cd but it still will turn off after 20-25 seconds

The cpu and heatsink i took out of my old computer which was just on last night i left them attached to the motherboard so it shouldnt be that overheating since i just installed them in my old computer about 4 months ago

EDIT: Actually it could very well be the cpu overheating, I managed to get into the bios and to system monitor and I noticed that the cpu temp was climbing frigin fast. My computer shut down after it got to 110c!

is 110c the max safe thermal temp for my cpu? god i dont want to turn it on again if the cpu is getting that HOT! Maybe i bumped the heatsink and damaged the thermal grease or something

 
 
 
 


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Ultimate Geek

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  #272981 14-Nov-2009 11:52
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woha, what thermal paste did you use when you took it out from your old computer into the new one???



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Master Geek


  #272986 14-Nov-2009 12:06
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i didnt change the thermal paste as i didnt take the cpu and heatsink off the motherboard because i was keeping the cpu and motherboard i was basically just changing the case and power supply

it just has the thermal paste that came with the cpu and heatsink all the system fans are working and the heatsink fan is working

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  #272993 14-Nov-2009 12:33
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I would re-apply some new thermal paste regardless, and let us know how you get on.

EDIT: I actually read what you said... Embarassed



86 posts

Master Geek


#273256 15-Nov-2009 16:24
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rscole86: I would re-apply some new thermal paste regardless, and let us know how you get on.

EDIT: I actually read what you said... Embarassed


lol i do that sometimes no problem :)

Could it be that the temperature thing is in the wrong place or is broken so my computer thinking that the cpu is at 110c shuts down to protect the cpu

Im going to check tomorrow as im not at my house this weekend. But if anyone has any better ideas of what could be wrong with it or of how to fix it please share them with me i really want to try out this computer!

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  #273259 15-Nov-2009 16:36
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I would re apply thermal greese and make sure you cpu cooler is attached / not filled with dust

 
 
 
 




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Master Geek


  #273265 15-Nov-2009 16:47
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boby55: I would re apply thermal grease and make sure you cpu cooler is attached / not filled with dust


where could i buy some more thermal Greese?

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  #273279 15-Nov-2009 18:26
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http://www.dse.co.nz/dse.shop/en/product/N1209

DSE would be the easiest if you want it same day.



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Master Geek


  #273308 15-Nov-2009 20:55
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thank you i will try and get the Thermal Grease asap. Im going to get my power supply replaced as the switch at the back doesnt work and i think it must of been dropped before i bought it.

hopefully one of those two things will help

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Ultimate Geek

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  #273332 15-Nov-2009 22:33
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Check out page 4 of this pdf for an example of how much thermal paste to use and how to apply it.
It is a lot less than you might think.

http://www.arcticsilver.com/pdf/appinstruct/as5/ins_as5_intel_quad_wcap.pdf

This document refers to Arctic Silver 5 thermal paste but applies when using any paste. I would purchase some 100% Isopropyl alcohol from the chemist or electronic shop to clean off all the existing paste from the CPU and heatsink.

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Ultimate Geek


  #273343 15-Nov-2009 23:26
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Double check that the heatsink clips didn't come loose when you changed over the mobo

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Master Geek


  #273348 16-Nov-2009 00:02
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My friend had a problem like this, he had got his motherboard second hand and it had been overvoltaged to the max. We just reset the bios values. CPU got up to 100c in about 10 seconds, luckily, the cpu wasn't damaged



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Master Geek


  #273489 16-Nov-2009 13:13
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OmniouS: Check out page 4 of this pdf for an example of how much thermal paste to use and how to apply it.
It is a lot less than you might think.

http://www.arcticsilver.com/pdf/appinstruct/as5/ins_as5_intel_quad_wcap.pdf

This document refers to Arctic Silver 5 thermal paste but applies when using any paste. I would purchase some 100% Isopropyl alcohol from the chemist or electronic shop to clean off all the existing paste from the CPU and heatsink.


thank you i will have a look at that when i get home



Adamal: Double check that the heatsink clips didn't come loose when you changed over the mobo


thank you i checked the heatsink clips and they are firmly clipped down and the heatsink isnt moving

dasimpsonsrule: My friend had a problem like this, he had got his motherboard second hand and it had been overvoltaged to the max. We just reset the bios values. CPU got up to 100c in about 10 seconds, luckily, the cpu wasn't damaged


thank you but By reset bios do you mean taking out the Cmos Battery?

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  #273492 16-Nov-2009 13:28
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That or if you have the time before it shuts down, go into the BIOS and tell it to load the Defaults.




XPD / Gavin / DemiseNZ

 

 


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