Computer shuts off unexpectedly

[jayric18]

Here is my Build:
Processor: AMD Ryzen 7 3800X (NEW)
Motherboard: B450-A PRO (NEW)
Graphics Card: nVidia GTX 1060 6 GB (1 Year old)
Case: RAIDMAX SMILODON ATX-612WB
RAM: G.SKILL Aegis 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Desktop Memory Model F4-3000C16D-16GISB (NEW)

Power Supply: CORSAIR TXM Series, TX750M, 750 Watt, 80+ Gold Certified, Semi Modular Power Supply (1 year old)
Cooler: Ryzen Stock Cooler (Wraith Prism) (NEW)
Hard Drive: ST3320620AS
SSD: PNY CS1311 240 GB

Here is my problem, my computer shuts itself off.

I ruled out thermal issues through looking at the temperatures through BIOS and other monitors and the fan is still spinning consistently.

 

I took apart the PC in an attempt to try and fix the issue, because I had the idea that the motherboard was causing an electrical short with the plate on the back of the case.

I have never overclocked any part of my system.

And for a time it seemed as if my issue was solved by removing the back plate entirely from the computer case.

Until these last few days when the computer has, once again, begun to shut itself down. Without being under load a significant load. There are no cable changes occurring, no vibrations occurring in the surrounding space, and things seem to be going fine, until the computer shuts itself down.

In an effort to try and cause a BSOD to tell some kind of information and rule out certain possibilities, I disabled the automatic restart that occurs, but the shutoffs are still occurring without displaying any sort of information.


There did not seem to be anything wrong with the way the motherboard was mounted on the case, and now that there is no back plate on the case where the USBs are plugged in, there should not be a short there.

Another little tidbit of information that might lead to the conclusion of a power distribution failure is that VERY RARELY (twice in the last month) when I try and run certain games, the monitors will go black, as if they were no longer connected to the computer, and then they would come back on. Only once did the monitors not come back on, but while that was happening, the sound was still playing through my headphones.

I was monitoring the temperatures in the bios when shutdowns were occurring, for the CPU and the GPU (The computer once or twice shut off while I was staring at the temperatures in the bios). I recently got into checking the reliability monitor tool, but it doesn't display any helpful information. When I look in the event viewer it doesn't have any recent hardware events at the shut off time, only the critical message when I reboot the pc saying that the shutoff that occurred at a given time was unexpected. Nothing is out of the ordinary there.

If at all possible I would like to save doing a reinstall of windows as a last resort.

The CPU, MB, and RAM were all new, but the case I have is not a new case, it is the same case that I have had for the past decade, so one idea is that the new MB is occasionally making contact with the case and that is causing the short. NOT SURE ABOUT THAT ONE.

I did not reinstall the OS, the HDD and SSD are still the same as before.

This particular type of issue is exclusive to since I upgraded the MB, Processor, ram.

If it were a software issue causing my crashes, wouldnt that cause a BSOD?

I believe that either there is still a short somewhere, or there has been irreparable damage done to the power supply (be it because of the shorting or because of another type of failure within that part.
 

What seems to be the cause of the problem and how do you recommend I approach solving it?

[Guest]

2 hours ago, jayric18 said:

Another little tidbit of information that might lead to the conclusion of a power distribution failure is that VERY RARELY (twice in the last month) when I try and run certain games, the monitors will go black, as if they were no longer connected to the computer, and then they would come back on. Only once did the monitors not come back on, but while that was happening, the sound was still playing through my headphones.

Then it's definitely not the PSU.  I can't even follow a tidbit of logic there. 

 

The PSU is not going to selectively power some things and not others.  It either does or it doesn't.

 

When you say your PC "shuts off unexpectedly", are you referring to just having your monitors go black or does the whole PC literally shut down, with fans coming to a stop, lights out on motherboard, etc?

 

[jayric18]

Just now, jonnyGURU said:

Then it's definitely not the PSU.  I can't even follow a tidbit of logic there. 

 

The PSU is not going to selectively power some things and not others.  It either does or it doesn't.

 

When you say your PC "shuts off unexpectedly", are you referring to just having your monitors go black or does the whole PC literally shut down, with fans coming to a stop, lights out on motherboard, etc?

 

The entire computer just shuts off, that is what has been happening. What I was trying to say there was that there was a little hiccup with the GPU once or twice.

[Guest]

1 minute ago, jayric18 said:

The entire computer just shuts off, that is what has been happening. What I was trying to say there was that there was a little hiccup with the GPU once or twice.

Ok.  So you ARE talking about two different things.

 

Let's try to focus on one.

 

When the PC shuts off, are you able to immediately turn it back on again with the case's power button?  Or do you have to power cycle the PSU itself?

 

[jayric18]

Just now, jonnyGURU said:

Ok.  So you ARE talking about two different things.

 

Let's try to focus on one.

 

When the PC shuts off, are you able to immediately turn it back on again with the case's power button?  Or do you have to power cycle the PSU itself?

 

It doesnt seem consistent. Today, for example, I turned on the PC and hopped into my online class. 30 minutes later, the computer shut off completely. So I tuned in on my laptop and tried to turn on the PC again. I booted it into BIOS and stared at the temperatures of GPU and CPU, both of which were at 20-30 degrees Celsius. And the computer shut off without those increasing. I left it alone after that.

 

An hour later, I turn on the PC again, without doing anything other than hitting the on button, and it has been on without problems for the last few hours so far. There are a couple of other examples, but I cannot really discern any cause or pattern. I ran a stress test and it didn't turn off, and I have been monitoring temperatures the entire time since I turned it on. 

[Guest]

Is the fan on the PSU spinning?

 

[jayric18]

51 minutes ago, jonnyGURU said:

Is the fan on the PSU spinning?

 

The fan is spinning when the computer is functional

[Guest]

1 minute ago, jayric18 said:

The fan is spinning when the computer is functional

Ok.  I was thinking if the PSU was overheating.....

 

Any other fault that would cause the PSU to shut down would require you to flip the switch on the back of the PSU of, then on, to reset it.

 

Unless there's a short on the +5VSB somewhere.  Which would be a USB device or the motherboard itself.

 

[jayric18]

1 minute ago, jonnyGURU said:

Ok.  I was thinking if the PSU was overheating.....

 

Any other fault that would cause the PSU to shut down would require you to flip the switch on the back of the PSU of, then on, to reset it.

 

Unless there's a short on the +5VSB somewhere.  Which would be a USB device or the motherboard itself.

 

So that would mean that the PSU is completely functional and it is a flaw in a short somewhere either on the motherboard or the case?

[Guest]

2 minutes ago, jayric18 said:

So that would mean that the PSU is completely functional and it is a flaw in a short somewhere either on the motherboard or the case?

Nothing is 100%.  But if a PSU shuts down due to "safety", it's a hard latch off unless it's a short on the +5VSB rail or thermal (which would require the PSU to cool down before it could be restarted).

 

 

[jayric18]

3 minutes ago, jonnyGURU said:

Nothing is 100%.  But if a PSU shuts down due to "safety", it's a hard latch off unless it's a short on the +5VSB rail or thermal (which would require the PSU to cool down before it could be restarted).

 

 

So, it could be a thermal issue in the PSU then potentially?

[Guest]

1 hour ago, jayric18 said:

So, it could be a thermal issue in the PSU then potentially?

Yes.  But you said the fan is spinning.

[jayric18]

1 hour ago, jonnyGURU said:

Yes.  But you said the fan is spinning.

It is currently spinning, and spins whenever I check it, but I only check it when the computer is functioning. Would there be a reason why on one start up it would fail to properly spin, when on the next it wouldn't? Or for the fan to cease spinning in the middle of a session?

 

I am just trying to diagnose which part needs replacement, whether or not I could get away with replacing the case or if I would have to replace the PSU entirely.

 

As you mentioned, the PSU could be the issue, but so too could there be a short somewhere in any point on the computer.

 

As this is only a problem since the replacement of a few parts, then reasonably, it could be that the motherboard was not installed properly, it could be that the power supply is having the struggles you mentioned, etc.

 

The best course of action would be to take note of the next time the PC turns itself off, and then IMMEDIATELY turn it back on, or try to, to see if the fan on the PSU is spinning properly.

 

If there were a short in a cable though, the PC would not be able to be on at all correct?

 

So then it would be a problem with there being a temporary short somewhere that doesnt happen all the time, only sometimes then?

 

Does my plan of attack sound right?

Would you reckon I should wait until that plan is put into place and I could diagnose a little bit more, or is there any one reason that may be the most likely reason as to why this inconsistent shut off pattern is occurring?

 

I've attached an image of the reliability history.

[Guest]

Well, given that your power supply worked in your old set up for a year and then you changed the motherboard and then this problem popped up, and add to the fact that the PSU is capable of supplying twice the power you actually need, I'm inclined to think the problem is the motherboard.

 

[jayric18]

2 minutes ago, jonnyGURU said:

Well, given that your power supply worked in your old set up for a year and then you changed the motherboard and then this problem popped up, and add to the fact that the PSU is capable of supplying twice the power you actually need, I'm inclined to think the problem is the motherboard.

 

The point of concern on that front was that I had a small hiccup for a few weeks where there was an issue with the back plate where the USBs go in on the back of the case, and I believe that it was causing a short whenever I would make contact with the plate. The motherboard would (if I am right) hit the plate and short out the board and cause the whole computer to shut down. That problem, I fixed with the removal of that plate, but I was worried that these resurgences of shut downs were because of any kind of damage those forced shut downs caused to the PSU or Motherboard during that time.

 

But it very well could be a point of contact elsewhere causing this current problem, but it all breaks down to the motherboard then right?

 

Does the clarification above change your opinion?

[Guest]

If that's what you think it is, why don't you tear down the PC and test it outside of the case?

 

[jayric18]

1 minute ago, jonnyGURU said:

If that's what you think it is, why don't you tear down the PC and test it outside of the case?

 

That is a very good point!