PC keeps shutting down randomly

My office PC keeps shutting down on its own a few times a day. It isn't even doing anything heavy.

Here's the Event Viewer log from today:
https://drive.google.com/file/d/1J4L...ew?usp=sharing

ASRock H310CM-HDV
Intel Core i3-9100F 3.6/4.2 GHz, 4c/4t LGA 1151 box
8GB DDR4 2666MHz PNY
Everest EPS-4800C
480GB 2.5'' Emtec X150 SSD, 520/500MB r/w SATA 6Gb/s
Nvidia GeForce GT 710 2GB

It feels like it's losing power for some reason. I'm not really sure why. Maybe the power supply is too weak? I already swapped out the power cable, so that wasn't it.

It’s still under warranty, so maybe I should just drop it off at a repair shop.

I can't seem to find the Event Viewer right now.

Have you had a chance to check your temperatures using something like CPUID HWMonitor? It’s possible something is overheating, so if you rule that out first,
you’d likely notice the case feeling incredibly hot to the touch—almost impossible to grab—and you’d usually be dealing with constant restarts or the Blue Screen of Death, rather than just a sudden shutdown.

It’s also possible your power supply is starting to fail or is simply underpowered, but definitely check those temps to make sure the processor, graphics card, or motherboard aren't overheating, or look for some kind of error
in the hardware, the OS, or the RAM; you could run a memory test, and it might be worth checking Device Manager to see if there are any driver conflicts,
or just run a quick virus scan.

You could also install CrystalDiskInfo to check the health of your hard drive and see if there are any bad sectors, though HD Tune or Hard Disk Sentinel might actually be better for that.
install them.

As a starting point, if you can borrow a power supply from a friend, try swapping it in to see if the system keeps shutting down.

That power supply you mentioned sounds like it might only be rated for 300W, and I’m honestly not sure if that's enough once you actually put a load on the machine; you can always look up your specific components online,
and most sites will recommend a sufficient wattage for you, though it's always a good rule of thumb to go a little higher just to be safe.
Even then, it isn't strictly about the raw wattage; for instance, those cheap 500W or 600W units are total junk, and you should really never skimp on the power supply—always
try to invest in a high-quality one.

If something were seriously overheating, the PC would probably shut itself off constantly, but my gut feeling is that this is a power supply issue. You'll just have to use the process of elimination
until you pin it down, or take it to a repair shop, but it sounds like a relatively minor fix.

Here’s the download link for the event viewer log... Once you grab the file, just open it directly in Event Viewer. I can't really make heads or tails of what it's saying, though. Anyway, the tech support folks say everything looks fine. We've been having some weird electrical surges at the office lately, so maybe that's playing a part somewhere..

NOW I HAVE THIS NEW HEADACHE -> THE PC TURNS ON AND THEN IMMEDIATELY SHUTS OFF DURING BOOT
This is my own rig. It was working perfectly fine before. I moved it to a new spot in my car, and when I tried to fire it up after a bit, it just keeps rebooting itself every 30 seconds or so.
The parts are all new and haven't been swapped out.

There's nothing showing up on the monitor.
The stock CPU cooler spins for a second and then stops, even though the LEDs around it are lit up (Ryzen build).
I tried blowing out the fans with some compressed air and reseated the RAM.
After doing that, the rear fan plugged into the motherboard just died—no spinning and no lights at all. When I moved it to a different slot on the board, it started spinning and lighting up again, but the computer is still stuck in this boot loop...

I tried plugging the PC into several different cables and various power strips at home, and even tried a direct wall outlet. Same result every time. It tries to start, struggles, shuts down, and restarts.

I even tried bypassing the power button on the case... I just pulled the plastic cover off and pressed the internal button directly. I heard a normal click, so I don't think the button is getting stuck and causing a continuous loop...

Do you think something got bumped loose during the move? Based on what's happening, any idea what the culprit might be?

Larry Taylor3 said:Here’s the download link for the event viewer log... Once you grab the file, just open it directly in Event Viewer. I can't really make heads or tails of what it's saying, though. Anyway, the tech support folks say everything looks fine. We've been having some weird electrical surges at the office lately, so maybe that's playing a part somewhere..

NOW I HAVE THIS NEW HEADACHE -> THE PC TURNS ON AND THEN IMMEDIATELY SHUTS OFF DURING BOOT
This is my own rig. It was working perfectly fine before. I moved it to a new spot in my car, and when I tried to fire it up after a bit, it just keeps rebooting itself every 30 seconds or so.
The parts are all new and haven't been swapped out.

There's nothing showing up on the monitor.
The stock CPU cooler spins for a second and then stops, even though the LEDs around it are lit up (Ryzen build).
I tried blowing out the fans with some compressed air and reseated the RAM.
After doing that, the rear fan plugged into the motherboard just died—no spinning and no lights at all. When I moved it to a different slot on the board, it started spinning and lighting up again, but the computer is still stuck in this boot loop...

I tried plugging the PC into several different cables and various power strips at home, and even tried a direct wall outlet. Same result every time. It tries to start, struggles, shuts down, and restarts.

I even tried bypassing the power button on the case... I just pulled the plastic cover off and pressed the internal button directly. I heard a normal click, so I don't think the button is getting stuck and causing a continuous loop...

Do you think something got bumped loose during the move? Based on what's happening, any idea what the culprit might be?

BINGO! I was messing around with my RAM and I think I figured it out—it looks like that first slot from the CPU on my ASRock B450 Pro4 isn't actually working. Maybe that's the issue?
It looks like that rear fan header marked CH_FAN1/WP isn't working either, I guess.
The RAM sticks seem to be working fine, I guess.

So, it looks like whatever is circled in this photo just stopped working: I think this looks pretty good! Maybe just double-check those temps if you can? I guess it should be fine though.

Did something die on the motherboard or what? I guess there might be a way to fix it, right? Everything is still under warranty, too. :/

So, what makes you think that's the specific part that's busted?

fadedorca66 said:So, what makes you think that's the specific part that's busted?

So, I'm just poking around here and frantically Googling at the same time. I can't even sleep because of this—it was working fine yesterday, then today, wtf happened? Things don't just break magically on their own, I guess.
If a component is failing... it probably just went haywire.

Anyway, I've tested three sticks, and they all work fine. But once I plug in all four, it won't boot. When I check the system info, it only shows 16 GB of RAM (even though I have four 8 GB sticks).

It seems like either the first and third slots are dead, or maybe the second and fourth... depending on how you look at it. Voilà. My first thought was to flash a new BIOS... but I don't have a single screwdriver in the house right now 🤦 so I wonder if that would even help?! 🙂 I'm such a newbie...

Let's start with the BIOS POST phase:
https://en.wikipedia.org/wiki/Power-on_self-test
https://www.computerhope.com/beep.htm

Are there any error indicators to look for—doesn't necessarily have to be an audible beep, could just be some text on the screen?