Question PC Turning Off and Turning On

[jjenerio123]

My PC Turns on and Turns off simultaneously.


Before I discuss thoroughly what had happened before this issue persisted, here are the key things that I've noticed:

1.) The date and the time zone of my PC randomly changes and does not sync in with my country (Philippines).

2.) Sometimes the USB Ports on the back of my motherboard does not detect my peripherals, although they do read my keyboard and mouse (since the RGB turns on).


Here are the fixes that I've tried after these symptoms have occurred:

1.) I tried changing and resetting the CMOS Battery.

2.) I successfully reinstalled Windows 11 Pro without any issues.

3.) I successfully updated the BIOS without any issues.

4.) I tried using MSI Kombustor to see if my GPU had any problems, but apparently it did not.

5.) I tried using SilverBench to see if my CPU had any problems, but it also did not have any problems as well.


After these, I tried cleaning the dust off of my PC, and sadly, my PC turns on and turns off simultaneously. I tried these solutions that I've found on the internet, as well as tutorials in YouTube:

1.) I tried resetting and reinstalling the CMOS Battery.

2.) I tried removing my GPU and it still doesn't fix the problem.

3.) I tried removing my case fans and the issue still persists.

4.) I tried removing all of my peripherals except my keyboard and mouse which was put directly at my PC Case's USB Ports (since they work except for my motherboard's).

5.) I tried reseating the RAM and putting only 1 RAM on my motherboard, but it did not solve my issue.

6.) I tried disabling XMP and it still didn't fix it.

7.) I tried using the CPU Cooler that came with the CPU but it did not fix the problem.

8.) I tried applying new thermal paste, but it didn't work either.


After I tried these solutions online, here are the events that occurred during the process in subsequent order:

1.) I managed to get onto BIOS. However, after a minute of trying to change some of the settings, it completely turned off and tried turning on by itself.

2.) I somehow managed to get to Windows 11, but after signing in, it turned off and tried to turn on again.


That is all. Can anyone help me and isolate my problem?



PC SPECS:

Motherboard: MSI B650M GAMING WIFI Motherboard

Processor: Ryzen 5 7600

GPU: MSI Ventus 2X RTX 4070 Dual Fan

RAM: OCPC Pista 8x2 16GB DDR5

Storage: Samsung 980 Evo 1TB

AIO/Cooler: MSI MAG CORELIQUID M240

PSU: Cougar GEX Series 750W 80+ Gold Fully Modular Power Supply

 

[Ralston18]

What is providing power to the computer?

Meaning the power connections leading up to and serving the computer:

Electrical circuit, wall outlet, power strips/surge protectors, the power cords themselves?

The described problems suggest an electrical short somewhere. Something broke that shorts out and the system turns off. Then moves a bit ending the short and the system starts again.

Simplify and/or swap cables and power sources one at time with known working (no power problems) locations and cables. Be methodical and change only one thing at a time.

Could be related to a fan: fan starts, something moves, shorts, and the system stops.

The back I/O panel being one likely suspect.

How old is the PSU? History of heavy use for gaming, video editing, or even bit-mining?

All that on and off may have corrupted files. May also have prevented the system from getting a proper or appropriate date and time setting.

My suggestion is to unplug and use a bright flashlight to examine all wires, connections, offsets, the I/O panel, etc..

Look for any signs of damage: bare conductor showing, kinked or pinched wires, cracks, loose or missing screws, wiggly components (not securely in place).

 

[jjenerio123]

What is providing power to the computer?

Meaning the power connections leading up to and serving the computer:

Electrical circuit, wall outlet, power strips/surge protectors, the power cords themselves?

The described problems suggest an electrical short somewhere. Something broke that shorts out and the system turns off. Then moves a bit ending the short and the system starts again.

Simplify and/or swap cables and power sources one at time with known working (no power problems) locations and cables. Be methodical and change only one thing at a time.

Could be related to a fan: fan starts, something moves, shorts, and the system stops.

The back I/O panel being one likely suspect.

How old is the PSU? History of heavy use for gaming, video editing, or even bit-mining?

All that on and off may have corrupted files. May also have prevented the system from getting a proper or appropriate date and time setting.

My suggestion is to unplug and use a bright flashlight to examine all wires, connections, offsets, the I/O panel, etc..

Look for any signs of damage: bare conductor showing, kinked or pinched wires, cracks, loose or missing screws, wiggly components (not securely in place).

The power is connected through a surge protector power strip. I also tried plugging it directly into the wall socket, but the issue persists. I disconnected all my case fans, leaving only the CPU cooler that came with the CPU. The PC was assembled in Sept. 2024. I don't edit videos or mine, though I do play games occasionally. Lastly, I don’t see any of the items you mentioned in the final part of your suggested solution.

I hope this helps with the conclusion.

 

[Ralston18]

Try a different wall socket and circuit if possible.

Then examine everything else in the case.

Also, after reading back: "8.) I tried applying new thermal paste, but it didn't work either."

What thermal paste was used and how was the thermal paste applied? Thermal shutdown being another possibility.

 

[jjenerio123]

Try a different wall socket and circuit if possible.

Then examine everything else in the case.

Also, after reading back: "8.) I tried applying new thermal paste, but it didn't work either."

What thermal paste was used and how was the thermal paste applied? Thermal shutdown being another possibility.

I also tried to plug it into another wall socket (in the living room), and it still didn't fix with my issue.

The thermal paste that I've used is the Thermal Grizzly Kryonaut High Performance Thermal Paste 5.5g which was applied using the "dot" method. I managed to get into BIOS once more and the temps are 36C for my CPU while my motherboard is at 30C.

 

[Ralston18]

This motherboard?

https://download-2.msi.com/archive/mnu_exe/mb/B650MGAMINGWIFI_EN.pdf

Be sure to verify that I found the applicable motherboard.

= = = =

Do you have another known working PSU that can be swapped in for testing purposes?

= = = =

Not sure what else to suggest.

Re-read and review the entire User Guide going page by page/step-by-step to double check everything.

Pay close attention to all fine print, warnings, etc.. When indicated, visit MSI's website for more up-to-date information.

For example: Because you removed the CPU etc. you should work through and check all of the Important Notes on physically numbered Page 27 of the User Guide.

Is there a known working speaker connected?

Any beep codes or debug LEDs ? (See Page 43).