Case power LED always on, even when computer off

mrochester · 26 Aug 2022 at 06:59

Hi all.

I’ve just upgraded my motherboard and processor. When the computer is off the power LED on my case is still on.

in the bios there’s a setting ‘turn on onboard LED in S5’ which is set to disabled (I’ve tried both enabled and disabled).

does anyone know what setting might be required to turn the power led off when the computer is off?

my motherboard is an Asrock A520M-ITX/ac

many thanks.

m.

phil-k · 26 Aug 2022 at 10:00

you could just unplug the lead for that LED from your motherboard if you don't require it

ttaskmaster · 26 Aug 2022 at 11:11

Mine (Asus X99 Pro USB 3.1) has a setting that keeps the USBs powered even when the PC is shut down.
I would presume yours has something similar, which is why the case power LED is showing.

mrochester · 26 Aug 2022 at 11:11

phil-k said:
you could just unplug the lead for that LED from your motherboard if you don't require it

I want the power led on the case to be on when the computer is on.

I don’t want the power led on the case to be on when the computer is off.

Glanza · 26 Aug 2022 at 12:59

Worth checking if it's a split + and - you've put the headers on the correct way round

mrochester · 26 Aug 2022 at 13:03

Glanza said:
Worth checking if it's a split + and - you've put the headers on the correct way round

It’s a split + and - and yes I’ve checked and they are the correct way around. My assumption is it wouldn’t work at all if it were the wrong way around?

Orcvader · 26 Aug 2022 at 14:55

In case it's due to hybrid sleep that Windows 10/11 does when shutting down, does turning off fast startup help? It's not really needed if you have a fast SSD as a boot drive.

mrochester · 26 Aug 2022 at 14:56

Orcvader said:
In case it's due to hybrid sleep that Windows 10/11 does when shutting down, does turning off fast startup help? It's not really needed if you have a fast SSD as a boot drive.

Fast boot is disabled .

Orcvader · 26 Aug 2022 at 15:05

mrochester said:
Fast boot is disabled .

Having a look at the manual, in the BIOS settings, under ACPI Configuration is Deep Sleep also disabled? Can't see anything else that could be making the board keep the light on. And just to check, are you on the latest BIOS?

mrochester · 26 Aug 2022 at 15:06

Orcvader said:
Having a look at the manual, in the BIOS settings, under ACPI Configuration is Deep Sleep also disabled? Can't see anything else that could be making the board keep the light on. And just to check, are you on the latest BIOS?

Yeah, it came with 1.8 but I flashed it with 1.9 this morning to see if that would make any difference but sadly not.

mrochester · 27 Aug 2022 at 06:55

Orcvader said:
Having a look at the manual, in the BIOS settings, under ACPI Configuration is Deep Sleep also disabled? Can't see anything else that could be making the board keep the light on. And just to check, are you on the latest BIOS?

Deep sleep is disabled.

SpudMaster · 15 Sep 2022 at 13:28

Not sure if this will help with the power LED but look for a setting called ErP Ready. That controls things like USB's remaining powered when the computer is turned off. Worth a shot

mrochester · 15 Sep 2022 at 13:40

SpudMaster said:
Not sure if this will help with the power LED but look for a setting called ErP Ready. That controls things like USB's remaining powered when the computer is turned off. Worth a shot

Sadly no such setting in the bios I can see.