[SOLVED] New build suddenly shut off, wont boot

[Snoffles]

I put together a new rig and was able to successfully start windows and everything seemed fine. After maybe about 30 minutes, out of nowhere my computer seemed to restart. My displays now have no input and I noticed that my keyboard had no power so I thought it was a PSU issue, though all of my fans are running, including the GPUs. I went to the store and bought a 1000w PSU in hopes that that'd be the fix, but unfortunately it did nothing. I tried a bunch of different troubleshooting steps, like taking out the RAM and testing them individually, doing the same with my GPU, resetting the CMOS, and cycling the power on my displays when the computer is powered on. My mobo does not have any of the debug lights on and does not make any beeps (not sure if it has speakers). I also suspected that the CPU could've been overheating, but I'm pretty sure it would've completely powered off, and I checked the heatsink and fan to make sure they were properly installed along with proper application of the thermal paste and it was. Any suggestions would be greatly appreciated!

Here are the specs:
CPU: AMD Ryzen 9 3900X
GPU: ASUS ROG Strix Geforce RTX 2080 Super, GTX 1080
Mobo: MSI MPG X570 Gaming Plus
Ram: 32GB G.SKILL TridentZ
PSU: EVGA Supernova 1000 G+
SSDs: 2x Samsung 970 EVO NVMe M.2

 

[RealBeast]

Start by pulling everything out of the case and putting it together on a table or desk (on a non-conductive material like cardboard or plastic). Easier to troubleshoot parts, rule out shorts, and take case switch issues out of the equation.

To start it you can simply short the two motherboard start pins with the tip of a screwdriver or whatever.

 

[natcha12]

What were you doing when it first started, installing drivers?

 

[Snoffles]

What were you doing when it first started, installing drivers?

At the time I had already installed my graphics drivers, drivers for the m.2 nvme ssd's, and some of the peripherals. I think it is worth mentioning that I was also trying use my old SSDs (had 2 from my last computer so at one point I had 4) and one had windows on it. Having that plugged in would cause my computer to get stuck on a black screen with an underscore on it (before the mobo's boot sreen) and so I removed both of the old SSDs. Since they're plug n play I plugged them back in while windows had already booted, and then formatted them both successfully. I have them both unplugged right now regardless and have only the 2 m.2 SSDs in right now. I think at the exact time I was literally just browsing the internet and installing some games.

 

[Snoffles]

Start by pulling everything out of the case and putting it together on a table or desk (on a non-conductive material like cardboard or plastic). Easier to troubleshoot parts, rule out shorts, and take case switch issues out of the equation.

To start it you can simply short the two motherboard start pins with the tip of a screwdriver or whatever.

I'll go ahead and try that. I'm curious though, what would that do? I'm not sure what I'm looking for as a result. The computer powers on when I press the power button on my case so I feel like that might not be the issue, though I'll still give it a shot.

 

[RealBeast]

First it eliminates the possibility of a component ground, it removes the computer case from the equation, and makes it much easier to swap components for further testing as needed. I generally do all my builds on my desktop before even putting them into the case.

A good result would be that it starts up just fine. 😉

 

[Snoffles]

First it eliminates the possibility of a component ground, it removes the computer case from the equation, and makes it much easier to swap components for further testing as needed. I generally do all my builds on my desktop before even putting them into the case.

A good result would be that it starts up just fine. 😉

Gotcha. I was able to power it on using a screwdriver so it doesn't look like the case it the issue.

 

[Snoffles]

I've decided to just get my CPU and mobo exchanged. My motherboard should be arriving today but the CPU is arriving tomorrow. I'm tempted to test if the CPU was busted or if it was the mobo, but I'm a little hesitant to potentially damage anything, if that's even possible.

 

[RealBeast]

I'd put it back together on the desktop and then if it works fine, put it into the case.

If you can RMA the motherboard and CPU, might as well do both rather than wait. It's a lot easier if you do a lot of builds and have piles of spare parts to work with. 😉

 

[Snoffles]

It turns out that my mobo was defective. After putting in the new parts, my rig is up and running! Now my only issue is that it takes nearly 2 minutes to even get to the mobo splash screen when I power it on, but I suppose I should so some more research on why that might be. Thanks again for the help!