The issue appears linked to both Windows and the motherboard.
The issue appears linked to both Windows and the motherboard.
I own a machine equipped with a B450F Strix board, R5 3600 processor, Teamgroup 2x8 DDR4 at 3200mhz, an EVGA GTX 1070 SC, a MSI Spatium M371 1TB drive, an EVGA 500B (probably), and running Windows 10. After installing the M.2 SSD (MSI Spatium M371), I encountered a problem. During a clean shutdown—powering off via BIOS or using the power-off/restart buttons—I saw a VGA LED light on the board. When I held the power button after that and performed a full shutdown before turning it back on, everything functioned properly. To troubleshoot, I tried several steps: switching sleep modes (no issues), re-flashing VBIOS, reseating GPUs (Radeon & NVidia), changing DVI to DP, removing the SSD, resetting BIOS to defaults, disabling Fast Startup in Windows. Also, I edited the system after saving and rebooting from BIOS, but exiting without changes worked. Updated June 17, 2023 by Earthlyhuman