Power light blinks once per second though Win 11 PC appears to be operating normallly

The flashing power light on your Windows 11 PC could indicate a few things, especially since you mentioned that the only notable item in Device Manager is the yellow flag under "Other Devices" for the RAID Controller. This typically suggests that there is a driver issue that might be affecting the system's power management features. Even if you are not using the RAID Controller, having an uninstalled driver can sometimes lead to abnormal behavior in power settings.

Here are some steps you can take to troubleshoot the issue:

1. Update Drivers: Try to find and install the appropriate driver for the RAID Controller. You can check the manufacturer's website for your motherboard or the RAID controller itself for the latest drivers.
2. Check Device Manager: Besides the RAID Controller, ensure that there are no other devices with warning signs in Device Manager. If there are, consider updating or reinstalling those drivers as well.
3. Power Settings: Review your power settings in Windows. Go to Settings > System > Power & battery and ensure that everything is configured correctly.
4. BIOS Settings: Sometimes, settings in the BIOS can affect power management. Check your BIOS settings to see if there are any options related to power management that might need adjusting.
5. Event Viewer: Check the Event Viewer for any warnings or errors that might provide more context about the power light issue. Look under Windows Logs > System for any related messages.

If the issue persists after trying these steps, it may be worth consulting with the manufacturer’s support for further assistance.

References:

• ACPI BIOS
• Troubleshooting Device and Driver Installations

Hi,

In the case of your pre-built computer, do you mean the LED keeps blinking even in hibernation mode?

Thanks

Specs:

OS Name Microsoft Windows 11 Home

Version 10.0.26200 Build 26200

Other OS Description Not Available

OS Manufacturer Microsoft Corporation

System Name

System Manufacturer ASUS

System Model System Product Name

System Type x64-based PC

System SKU SKU

Processor 13th Gen Intel(R) Core(TM) i9-13900K, 3000 Mhz, 24 Core(s), 32 Logical Processor(s)

BIOS Version/Date American Megatrends Inc. 1205, 6/14/2023

SMBIOS Version 3.5

Embedded Controller Version 255.255

BIOS Mode UEFI

BaseBoard Manufacturer ASUSTeK COMPUTER INC.

BaseBoard Product PRIME Z790-P WIFI

BaseBoard Version Rev 1.xx

Platform Role Desktop

Secure Boot State Off

PCR7 Configuration Elevation Required to View

Windows Directory C:\WINDOWS

System Directory C:\WINDOWS\system32

Boot Device \Device\HarddiskVolume1

Locale United States

Hardware Abstraction Layer Version = "10.0.26100.1"

User Name

Time Zone

Installed Physical Memory (RAM) 64.0 GB

Ivan,

I opened up the case to vacuum the filters (which I do from time to time) -- they were not very dirty -- and while at it, I pressed down on the video card just to try to make certain it was well seated into the mother board. I did not feel any 'give' or problem. Nonetheless, when I put things back to rights and rebooted the machine, there was no coded beep, and the power light is no longer flashing. So . . .

I'll keep an eye and 'ear' on things and get back to you, in at most, several days.

Thanks again.

TU Ivan, so far, so good. Very much appreciate your help!