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Pc shuts off after 30 secs or so

post #1 of 9
Thread Starter 
Hello , I've been working on a friends stubborn computer for about a week now trying everything i can to get it to stay on. It shuts down after about 30 seconds of run time no matter what I do.
The pc was in a power surge and my first guess was to replace the power supply unit. Originally it wouldnt even turn on. So i disconnected everything , wires, ram ,cards ,psu , etc... then i held down the power button to discharge stored energy. Replaced the psu with a good one that i know works perfectly , even tried two other psu units. The comp turned on after replacing psu , but it shuts off not long after. Long story short , with only the basics hooked up to this pc it still shuts off. Basics = psu unit , one stick of ram , no harddrives or cdroms. It has onboard graphics and ive also installed a third party card for the hell of it. Nothing works. Oh , ive also cleared cmos. Sorry if this post is hard to understand , im on my phone at work lol
post #2 of 9
Are you sure the fan is working on the CPU? Sounds like a heat issue.
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post #3 of 9
Quote:
Originally Posted by jekeler69 View Post

Hello , I've been working on a friends stubborn computer for about a week now trying everything i can to get it to stay on. It shuts down after about 30 seconds of run time no matter what I do.
The pc was in a power surge and my first guess was to replace the power supply unit. Originally it wouldnt even turn on. So i disconnected everything , wires, ram ,cards ,psu , etc... then i held down the power button to discharge stored energy. Replaced the psu with a good one that i know works perfectly , even tried two other psu units. The comp turned on after replacing psu , but it shuts off not long after. Long story short , with only the basics hooked up to this pc it still shuts off. Basics = psu unit , one stick of ram , no harddrives or cdroms. It has onboard graphics and ive also installed a third party card for the hell of it. Nothing works. Oh , ive also cleared cmos. Sorry if this post is hard to understand , im on my phone at work lol

Did you double check the cooler? Maybe it is not seated correctly and getting hot, causing it to shutdown thinking.gif
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post #4 of 9
It's likely if the PSU was fried that a few other parts were fried as well. In my opinion, Id say you'll be lucky to get it going without replacing most everything. It could be the motherboard, ram, or anything else that got a huge electrical surge.
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post #5 of 9
If it is one of those Intel chips with the stock cooler I bet one of the prongs that hold it down slipped out of its hole so you may want to check all 4 of them. They are the 4 Black clips around the stock CPU cooler, just press them down while in locked position. Also replace the TIM, the stock stuff isnt that great.

If not probably dead board.
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Red Dragon
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveHard DriveHard Drive
3x 640 WD blacks Raid 0 Mushkin Enhanced Reactor 512GB SSD Sandisk 1TB SSD Samsung 470 Series 128GB SSD 
CoolingOSMonitorKeyboard
XSPC Raystorm Windows 10 64bit Microboard m340clz 100hz 3440x1440 Corsair K70 
PowerCaseMouseAudio
TX850 HAF922 Logitech G502 Creative Sound Blaster Z  
AudioAudioAudio
Elac B6 & Dayton Audio SUB-800 Yamaha HTR-5790 Audio Technica ATH-A700 headphones 
CPUMotherboardGraphicsRAM
Q9550 @ 4GHZ Gigabyte EP45 UD3P GTX470 4GB OCZ Reaper 1150mhz 
Hard DriveHard DriveOptical DriveCooling
Western Digital Blue 500gb OCZ Vertex 2 60GB LG Bluray Corsair H50 
OSKeyboardPowerCase
Windows 7 Home Premium  Logitech K400 Corsair CX500 nMEDIAPC 6000B 
AudioOtherOtherOther
Yamaha HTR-5063 PS3 80GB BC PS3 with 250GB hard drive. Polk Audio Monitor 60s Bi-AMP Front Polk Audio Monitor 30s Rear 
OtherOther
Polk Audio CS1 Center Polk Audio PSW10 
CPUMotherboardGraphicsRAM
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Hard DriveHard DriveHard DriveHard Drive
5TB Toshiba 5TB Toshiba 5TB Toshiba 2TB Hitachi 
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post #6 of 9
Thread Starter 
Quote:
Originally Posted by avw616 View Post

It's likely if the PSU was fried that a few other parts were fried as well. In my opinion, Id say you'll be lucky to get it going without replacing most everything. It could be the motherboard, ram, or anything else that got a huge electrical surge.

It seems as if the original psu didnt get fried , because it works as well as the good ones. Ultimately 3 psus can only keep it alive about 30 secs.
post #7 of 9
Temps? Beep codes? Any LED codes on the motherboard?
post #8 of 9
Thread Starter 
Quote:
Originally Posted by DzillaXx View Post

If it is one of those Intel chips with the stock cooler I bet one of the prongs that hold it down slipped out of its hole so you may want to check all 4 of them. They are the 4 Black clips around the stock CPU cooler, just press them down while in locked position. Also replace the TIM, the stock stuff isnt that great.
If not probably dead board.

This seems like a good suggestion , credit to ibooni too. Ill give it a try tomorrow when I get home. Didnt want to remove the cooker though if i dont have to. I failed to mention that when i first got it to power up , it booted up fine with no beeps. Even made it to the windows loading screen . It definitely seems like something hard coded to the board itself is shutting it down , like you guys suggest , i assume its heat related. Any other ideas would be appreciated too , incase reseating the cooler doesn't help.
post #9 of 9
Thread Starter 
Quote:
Originally Posted by mmonnin View Post

Temps? Beep codes? Any LED codes on the motherboard?

Nope , sorry no beep codes. I dont recall ever hearing it beep now that i think about it. It may not have a speaker. I wasnt aware the leds beeped in code , what should i be looking for ? And ill try to get the temps from bios in the morning if it will show me. Its an older custom built pc
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