Does the ATX 12v (4 Pin) connector causes random pc shut off?

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darth.gabby

darth.gabby

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Hi!

I have been diagnosing my pc for a couple of weeks now. bread-boarding.
I came to the thought that the ATX 12v (4 pin) connector is faulty, (new psu).

My question is, can it shut off (randomly) a pc on cold boot -if an ATX 12v (4 pin) is faulty via condensation (high humidity area around 80%).
 
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T

Yes, a faulty 4 pin power connector could probably cause the PC to shut off, given that's what's providing power to the CPU.
But more importantly, are you saying you have water (condensation) in your 4 pin connector?? Because that would obviously be very bad. I don't understand how you would have condensation though, unless you're somehow cooling your PC to sub-ambient or have 100% humidity in the room.
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TJ Hooker

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Yes, a faulty 4 pin power connector could probably cause the PC to shut off, given that's what's providing power to the CPU.
But more importantly, are you saying you have water (condensation) in your 4 pin connector?? Because that would obviously be very bad. I don't understand how you would have condensation though, unless you're somehow cooling your PC to sub-ambient or have 100% humidity in the room.
 
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darth.gabby

darth.gabby

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Hi! sorry for the wrong term "condensation". I just tried to clean the 4 pin contacts found on the motherboard. just to check if this is causing the computer "shut off" (randomly)

scenario: power on the computer (cold boots) after 2 minutes it would shut off. after powering it on again, I can use it for more than 10 hours no shut offs, the shut offs just happens in "cold boot".

also tried bread-boarding - PSU+PROCESSOR+MOTHERBOARD ONLY. it also shuts off randomly.
then it worked okay after I assembled it back to the Chassis. then moved my PC (rearranged the pc table) then powered on again. then had a shut off again. I think it's the 4 pin atx 12v connector and the 24pin connector. since that's the only part I have been removing/reconnecting when bread-boarding.

or possibly a failing motherboard? what do you think?
thank you.
 
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darth.gabby

darth.gabby

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This is an old computer (7 years old - Motherboard and Processor) not overclocked.

CPU - AMD Athlon X3 435 (new thermal paste Deepcool Z5)
Motherboard - ASRock N68C-S UCC
4GB Zeppelin DDR3 RAM (1333mhz) (Memtest Passed)
Western Digital Blue Caviar 1TB (no bad sectors - newly clean installed)
PSU - DeepCool DE530 (rated 400 watts) (Newly bought for testing the PC shut off)
PSU 2 - Greatwall 450WL Black Series (replaced to check shut off problem)
ROM - ASUS DVD-RW Lightscribe.
Graphics Card - ASUS Nvidia GT630
Chasis - Gigabyte Chassis GZ-X6
1 x 120mm front fan
1x 120 mm rear fan
1x 80 mm side fan
1x DeepCool HDD fan

Burn in Test via Passmark BurnIn Test - Passed.
room humidity is 70 to 80 percent.
 
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darth.gabby

darth.gabby

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Yes, just a cheap power supply (but somehow belong to a "good psu brand" in Asia). but both did the same as to shut off the pc (brand new and the old psu) on cold boot.

will test if cleaning the 4 pin atx 12v socket will fix the problem.
another test I have is to clean the motherboard with electronic contact cleaner.
if it is still shutting off, I think it would be a faulty motherboard.
 
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darth.gabby

darth.gabby

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Yes, the psus doesnt shut off on load, also tried playing "wasteland 2 director's cut" for full 10 hours.

Will keep you posted, on this issue.
 
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