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New Pc worked fine then suddenly shutdown and stays stuck at motherboard screen

This will be long and some parts might seem like I’m storytelling and useless but I rather give all the little details.

 

So I’ve built a couple pc’s before but this was my first full custom hard tubing water loop pc. Everything went well, bios update and tested everything out of the case before hand. Post was good and everything was showing up as it should in bios. So I installed it in the case and got windows installed. After that everything was still good. The next day I ran multiple benchmarks for around 6-7 hours (yes I know that’s a longtime but wanted to be safe). Still everything was fine. The next morning I opened the computer and everything was still fine. I was scrolling through the bloatware that comes with windows and noticed Norton was installed. So I uninstalled that. When starting up the pc (a restart was needed to uninstall Norton) it froze at motherboard screen. Not thinking much about i started by waiting a bit but after 10-15min still nothing so I restarted and everything started up fine. I then tested a couple games mostly the ones my old pc was having a hard time with (warzone, escape from tarkov). Once again everything was good except it sometimes froze at motherboard screen and a restart was needed but would boot fine after.  I was ready to use my new pc but I had to go help my dad so I left it running. Upon coming back 2 hours later I moved the mouse to see if everything was still good and it was. So I made myself something to eat and while doing so I look over my shoulder to see that one of my cats is walking on the keyboard. I got him off and saw the pc had black screened. Upon restart it froze at motherboard screen again but this time restarting didn’t help. It would just freeze at motherboard screen without being able to go to bios. Quite bummed out I started troubleshooting what I could didn’t want do drain the loop and start taking it apart to test bench it. I started with ram (reseating, taking one out then testing the other, testing different lanes and even testing ram from another functional system) nothing. Tried unplugging and replugging power cable, changing the pcie cables to spare ones I had, still nothing. The cpu was not reachable since there is a cpu&vrm monoblock and would need to drain loop and remove motherboard to access it. The gpu also has a waterblock with active backplate so I would also need to drain the loop. The ssd is an m.2 behind the gpu and also not reachable without taking everything apart. By now when I’m restarting I don’t even get to motherboard screen but everything powers up.
 

Yes I know I will need to take it apart to troubleshoot and fix it but I’m asking here in case anyone has had something similar and could maybe give me a small idea but I also know how finicky computers can be and that what worked for another might not work for me. 

 

CPU : ryzen 7 5800x

MB : gigabyte aorus x570 elite with ekwb waterblock

RAM : g.skill trident z neo 3600

GPU : Evga RTX 3080 Ftw3 ultra with ekwb waterblock

SSD : Samsung 870 evo 500gb

PSU : Seasonic focus gx-1000 80+ gold

 

Yes it’s a 2-3yr old build and Im just now asking. I was really bummed out and also pretty busy and not much money to put back into it. I also have another working pc so I’ve been using that one.

 

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10 minutes ago, Bamboostik said:

This will be long and some parts might seem like I’m storytelling and useless

yes

12 minutes ago, Bamboostik said:

Yes it’s a 2-3yr old build and Im just now asking. I was really bummed out and also pretty busy and not much money to put back into it. I also have another working pc so I’ve been using that one.

has this machine been broken for 2-3yrs and just now being diagnosed?

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9 minutes ago, Bamboostik said:

No it was diagnosed 2-3yrs ago

ok so the issue was solved then 2-3 years ago? or?

 

 

55 minutes ago, Bamboostik said:

By now when I’m restarting I don’t even get to motherboard screen

ok so basically just as you would for any machine with a no post state. remove everything not needed for the machine to post like drives/extra ram/probably that water cooling stuff etc.... do a bios reset and see if it'll post with the minimal hardware.

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1 hour ago, Bamboostik said:

Yes it’s a 2-3yr old build and Im just now asking. I was really bummed out and also pretty busy and not much money to put back into it. I also have another working pc so I’ve been using that one.

Try booting on a linux live USB stick to bypass your current OS. If you can do that, the problem is not hardware.

When you say that it freezes at the motherboard screen, are you able to enter the BIOS ?

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1 minute ago, Bamboostik said:

And no it does not let me into bios.

Did you try clearing the CMOS memory ? You may be able to perform that one without breaking the water loop.

I doubt it would be useful but you can try doing a BIOS flashback.

 

Good luck !

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40 minutes ago, emosun said:

ok so the issue was solved then 2-3 years ago? or?

 

 

ok so basically just as you would for any machine with a no post state. remove everything not needed for the machine to post like drives/extra ram/probably that water cooling stuff etc.... do a bios reset and see if it'll post with the minimal hardware.

Unfortunately the issue was never solved. 
Yeah I do know I need to be taking it apart if I want to figure out what the problem is. All I wanted to know is if someone experienced something similar, mostly the part where this all started after uninstalling Norton which I find weird.

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6 minutes ago, Sawa Takahashi said:

Did you try clearing the CMOS memory ? You may be able to perform that one without breaking the water loop.

I doubt it would be useful but you can try doing a BIOS flashback.

 

Good luck !

Clearing CMOS unfortunately didn’t help. When I tried flashing bios It just went on forever. I will have no choice but to take it apart to know for sure. 
 

Thanks!

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1 hour ago, Bamboostik said:

mostly the part where this all started after uninstalling Norton which I find weird.

the os software has nothing to do with a no post state as the hardware has to be functional for the software to come into play

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On 1/14/2025 at 10:23 PM, Bamboostik said:

I will have no choice but to take it apart to know for sure. 

I also think you have no choice. There is a hardware issue and you need to solve it before meddling with Windows and other stuff.

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