Question HELP! Abnormal sleep, shutdown and powered off state behavior of my PC

[syjxsk]

I've been observing weird behavior in the last 2 months of my 4yo self-built Ryzen PC.

I've uploaded 2 Videos on YouTube showcasing the problem,

When powering ON the PSU (Scenario-1)

When shutting down the PC (Scenario-2)

In Scenario-1, at 0:08 seconds of the video, as I turn on the switch, the hdd/system activity LED & EZ Debug LED (showing CPU fault) on my MoBo turns ON and remains ON until I press the power button on the cabinet to turn ON the system itself.

In Scenario-2, as I shutdown the PC, at 0:06 seconds of the video, power button light turns OFF as intended but hdd/system activity LED turns ON and remains ON along with all the System fans running at a constant speed until power switch for the PSU is toggled OFF.

Is my PSU at fault? Or is the Motherboard? I've a gut feeling that my PSU is showing these signs of failure. Please help me troubleshoot this issue, PC runs fine as it is, but my usage has been sparse since I've also got a gaming laptop with me.

Posting my PC specs below

AMD Ryzen 5 3600
Crucial Ballistix 32GB (16GBx2) 3600MHz CL16 RAM
MSI B550 Tomahawk
Nvidia GT 710
Gigabyte B700H 700W Power Supply

 

[Ralston18]

Refer to the Motherboards User Guide/Manual and double check the case/front panel connections.

It is very easy to get the connections mixed up.

This Motherboard?

https://download.msi.com/archive/mnu_exe/mb/MPGB550GAMINGPLUS_EN.pdf

Verify that I found the appliable User Manual.

Front Panel connections are presented on physically numbered Page 33.

 

[syjxsk]

Refer to the Motherboards User Guide/Manual and double check the case/front panel connections.

It is very easy to get the connections mixed up.

This Motherboard?

https://download.msi.com/archive/mnu_exe/mb/MPGB550GAMINGPLUS_EN.pdf

Verify that I found the appliable User Manual.

Front Panel connections are presented on physically numbered Page 33.

This motherboard -> https://download.msi.com/archive/mnu_exe/mb/MAGB550TOMAHAWK.pdf

I've double checked the connections of my case's front panel IO and switches with Motherboard and they're all okay.

I haven't touched them at all since 2020, this issue started happening recently. I redid the power ON and OFF test got the same result