I built this PC as Windows 10 in October 2022. It had this problem of, while I was away for a few days, shutting down. But I'd get home and the Power Button's LED would still be illuminated.
I could not restart the PC, could not hard-shut down by holding the Power Button down for 30 seconds or more, I had to disconnect the power, and then it would restart after reconnecting AC and pressing the Power Button.
This would happen occasionally with no pattern or reason that I could figure.
When I upgraded to Windows 11 in 2023 or 2024, this odd problem would continue.
In May this year (2025), I wiped the C:\ drive clean and reinstalled Windows 11 and then my programs, as well. The problem seemed to have disappeared.
However, in the past month, the infrequent shutdowns with the Power Button staying on have returned, maybe 3-4 times at most and once again between yesterday and today. I have no way of forcing this to occur.
HELP!!
Key System Components
PRIME B550M-A with Ryzen 5 4500 CPU
BIOS 3631 (I will be installing 3634 shortly, but won't have any clear idea if this solves this problem until I go 1-3 months without a random shutdown)
(2x) Corsair DDR4-2133 (1066 MHz) total 16 GB (part no. CMK16GX4M2B3200C16)
NVIDIA GeForce RTX 2080 Ti
Samsung SSD 980 500GB as primary (C:\Windows) drive, with 2 WD 1 TB HDDs for data, backup
