Computer turns off randomly, no warning or crash screen.

Landonut

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Jun 14, 2014
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I have A AMD FX 4300 quad-core processor (64 bit 8gbs of ram) Cyberpower Pc. A decent chunk of the time my cpu will run fine, but it will randomly turn off, and stop working. It shuts off without warning or a crash screen. My first instinct was the PSU, so I did a stress a test that brang the gpu up to 99% and it stayed on. It's temp. sits firm between 40-52, and shuts down without any pattern. Naturally I dusted everything and chcked the plugs, it all checked out ok. I ran an anti virus and updated anything update able yet the problem persists. Any advice?

EDIT- The first time it shut off I picked it up it and noticed a liquid at the bottom of the cpu, but not sure of any shorts do to the cpu still being able to run for hours *on a good day* without a shutdown.
 
99% gpu load might not be an accurate stress test for the psu, depending on what gpu you have. I suggest you look at the make and model, and check it against the tiered list (https://community.newegg.com/eggxpert/computer_hardware/f/135081/t/45344.aspx?Redirected=true). If the psu is tier 4 or 5, I'd suggest replacing it regardless of it apparently passing your stress test. If it's tier 1 or 2, the problem is more likely to be somewhere else.
 

Landonut

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Do you think the liquid I found under the cpu could have had any impact?
 

Landonut

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Also, it's listed under tier 2 for the psu's so that kind of rules it out.
 
It could be an indication of leakage, and I'm a bit surprised you'd use liquid cooling on an FX-4300. I suggest you start by drying off the liquid you found (if you haven't already) and checking the liquid cooling system for leaks. If you made a custom loop for yourself, you might be able to drain it and replace a few parts to fix it, but if it's a sealed-loop cooler, it's probably safer to just replace it if it's leaky.

btw, what did the liquid land on to make you think it isn't shorting something? gpu backplate?
 

Landonut

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While waiting for you to reply I did some research (i'm a nooby in the cpu parts / building world ) and found my fan. It's a stock fan so of corse it isn't water cooled so it leaves me concerned with what that liquid was. I figured if it had shorted anything I don't think I would be able to turn it on, and on a good day have it run smoothly for several hours. It has to be the fan though, when I turn the cpu on it doesnt turn on right away, and i tend to have to spin it myself until it comes back to life. Which confuses me, if the fan isnt working properly but the cpu isnt overheating, what could possibly be the problem. I don't know what to check at this point.

figured I'd throw in some symptoms to maybe help a diagnoses here. When it does shut off, if I immediately turn it back on it will light up, then power off again. Only way to get it back on, even if temporarily, is if i wait some time which leads me back to overheating.
 
Some motherboards have default safety settings to turn off the computer if the cpu fan stops (or just drops below a certain rpm). If the fan doesn't want to spin by itself, perhaps the liquid you found was lubricant for the fan bearings. I suggest you start by getting a new cpu cooler, such as a Cooler Master Hyper TX3 or Hyper 212 EVO.
 

Landonut

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Noted for now, will make solution after i test.
 

Landonut

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I'm not sure if you will see this but the problem IS DEFIANTLY overheating. My assumption is the fan isn't working properly. After a bit of manual spinning and getting it to work, it seems to be working normal. After opening a CPU intensive game, I checked the temperatures and watched them climb to nearly 195 degrees Fahrenheit. I waited tell night time when it was nice and cool, turned a fan on * normal fan for cooling the house* and pointed it in it's direction a solid foot and a half away, then tried running the same game again. CPU temp Skyrocketed 180+ I'm going to assume it's the fan, but I figured if it was spinning it would be capable of doing its job. Any wisdom?
 
I had been taking a break from participating in the TH forums, so I hope this isn't too late to help you.
I think it's more common to go by the celsius temperature for the cpu, and 195 degrees fahrenheit is about 90.5 degrees celsius, which would be dangerous for an Intel cpu and is crazy high for an AMD FX cpu.
If pointing a house fan at it gave such a small change in temperature, the heatsink probably isn't mounted properly. I still suggest you get a new cpu cooler (if you haven't already) - the Hyper 212 EVO is only about US$30.