Question Motherboard light pop up at night (unplugged)

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Milan0308

Milan0308

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Jan 6, 2023
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Why is my motherboard light show up at night ? It does this more time at night when it's unplugged. I know there CMOS battery. But why is that just random?
 
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Ralston18 said:
Make and model motherboard?

What color is the light? Location?

By "unplugged"you mean that the power cord to the PSU is taken out of the wall outlet?
Click to expand...
Sorry I forgot to wrote these stuff. Asus b660m plus wifi d4. Rgb colors TUF rgb. I don't know if the indicators are lit or not because they are small. I woke up in the evening and he did it right then, but it has happened several times before. Exactly 1 extension cord is closed, so it is not pulled out. But the extension cord disconnects the current normally.
 
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dwd999 said:
If this is an ASUS motherboard with various lights built in there is a setting in bios to control those lights and it needs to be set to STEALTH.
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But it's not getting any power. I mean from CMOS battery, but nothing else, so I think it should not light up. And it's not continuous. It only flashed for a second.
 
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So the light only flashes when you unplug the extension cord?

Was the computer shutdown beforehand by using the Windows Shutdown menu?

The computer should not be being shutdown by unplugging the extension cord or using some switch in the power connections to the PSU.

= = = =

This motherboard?

Asus b660m

Verify that I found the applicable User Guide.

Use the Motherboard Overview on Page 1-1 to identify the LED that flashes when the extension cord is unplugged.

I believe that you may be referring to the System Power LED as mentioned at the top of Page 1-5. Is that correct?

If not please identify the LED that flashes.
 
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Ralston18 said:
So the light only flashes when you unplug the extension cord?

Was the computer shutdown beforehand by using the Windows Shutdown menu?

The computer should not be being shutdown by unplugging the extension cord or using some switch in the power connections to the PSU.

= = = =

This motherboard?

Asus b660m

Verify that I found the applicable User Guide.

Use the Motherboard Overview on Page 1-1 to identify the LED that flashes when the extension cord is unplugged.

I believe that you may be referring to the System Power LED as mentioned at the top of Page 1-5. Is that correct?

If not please identify the LED that flashes.
Click to expand...

Yes. I unplug it every day. So it's not correct? I damaged my pc? I completly shut down windows, I use shut down. Then I just unplug the extension cord. So I'm not switch to off the power supply. On page 1-1 the TUF logo flashed just for a second. I don't know if 18 number lights are flashed too. Because I just woke up and it was just a sec. I didn't even see it completely, I just turned around and the light was gone.
 
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Referencing "18".

This?

"18. Q-LEDs
The Q-LEDs check key components (CPU, DRAM, VGA, and booting devices) during the
motherboard booting process. If an error is found, the critical component’s LED stays lit up
until the problem is solved."

There may be an initial flash just to verify that all the LEDs are working.

Or was it the System power LED that flashed/flashes?

"16. System Panel header
This header supports several chassis-mounted functions.
• System power LED (4-pin PLED)
This 4-pin header is for the system power LED. Connect the
chassis power LED cable to this header. The system power
LED lights up when you turn on the system power, and
blinks when the system is in sleep mode."

If the system has been properly shutdown there should be no harm in unplugging the extension cord. Especially in areas (not asking) with frequent power problems. I often unplug wall outlet connections when thunderstorms are moving into my area.

Just continue to watch and determine what LED or LEDs are flashing and when they do so.
 
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I don't know, but as you wrote, all the LEDs light up during boot. I think this is because I disabled fast boot and everything
check taste.
I see that the 16 is connected. As you said, when it is turned on, it lights up continuously, but something else also flashes on the header panel. But it's not about those.
Also today, the TUF logo flashed for a second at about 3 a.m. But he can do this several times in one night, I don't know. I am attaching which light I see flashing all the time. But unfortunately, I only saw the light of this one, and as a result, I don't see the light of other LEDs. By the time I look over, the light has already gone out. I know that in this case it has to be constantly lit and that is not the problem.

https://drive.google.com/file/d/1wgja1pzBCF966mDNuHC-qFaragdPSn-h/view?usp=sharing
 
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Milan0305 said:
I don't know, but as you wrote, all the LEDs light up during boot. I think this is because I disabled fast boot and everything
check taste.
I see that the 16 is connected. As you said, when it is turned on, it lights up continuously, but something else also flashes on the header panel. But it's not about those.
Also today, the TUF logo flashed for a second at about 3 a.m. But he can do this several times in one night, I don't know. I am attaching which light I see flashing all the time. But unfortunately, I only saw the light of this one, and as a result, I don't see the light of other LEDs. By the time I look over, the light has already gone out. I know that in this case it has to be constantly lit and that is not the problem.

https://drive.google.com/file/d/1wgja1pzBCF966mDNuHC-qFaragdPSn-h/view?usp=sharing
Click to expand...
Capacitors can hold charge very long time, potentially indefinitely. MB has a lot of them but PSU has very large and of high capacity. One way to discharge them is to push start button after disconnected from main power.
 
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CountMike said:
Capacitors can hold charge very long time, potentially indefinitely. MB has a lot of them but PSU has very large and of high capacity. One way to discharge them is to push start button after disconnected from main power.
Click to expand...
I don't think the capacitor is the problem. TUF logo show up for a long time when I disconnect it from the power supply. And then all of a sudden in the middle of the night there will still be electricity?
 
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Milan0305 said:
I don't think the capacitor lights up for a long time when I disconnect it from the power supply. And then all of a sudden in the middle of the night there will still be electricity?
Click to expand...
Well, it's either some stored electricity possible only with batteries or capacitors, nothing else can store it or are those ghosts or boo rays generating electricity. As I said, capacitors can store electricity for very long time and some event may trigger them in BIOS which is always under power from battery.
 
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CountMike said:
Well, it's either some stored electricity possible only with batteries or capacitors, nothing else can store it or are those ghosts or boo rays generating electricity. As I said, capacitors can store electricity for very long time and some event may trigger them in BIOS which is always under power from battery.
Click to expand...
Okay, but is this wrong or could it be some kind of hardware error? Is this usual? However, in addition to this, as far as I know, it can also be caused by some external factor.
 
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CountMike said:
What external factor could produce so much electricity ? EMP ? Did nuclear bomb blow somewhere close ? Sunspots, Moon tides, shifting magnetic field just under your PC ?
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Haha, but actually for example if for some reason the extension cord switches back on for a very short time. It's not unplugged. On my extension cord has a switch to on or off. Btw I believe you I just want to make sure. So what do you think is it hardware error or what? You said capacitors store power for it. I understand but is it normal or not? Because I don't see problem like that on internet. Should I contact with motherboard manufacturer?
 
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Milan0308 said:
Haha, but actually for example if for some reason the extension cord switches back on for a very short time. It's not unplugged. On my extension cord has a switch to on or off. Btw I believe you I just want to make sure. So what do you think is it hardware error or what? You said capacitors store power for it. I understand but is it normal or not?
Click to expand...
It's normal for capacitors to store power, that's what they are made for. Normally there should be a circuit that empties electricity when turned off as a safety measure. Why don't you unplug main cord or turn off switch on the PSU ?
 
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CountMike said:
It's normal for capacitors to store power, that's what they are made for. Normally there should be a circuit that empties electricity when turned off as a safety measure. Why don't you unplug main cord or turn off switch on the PSU ?
Click to expand...
Im not as dumb as you think. Im not think about capacitors. Ofc they store energy, but how is that possible if I switch to off my cord then about 20 seconds for the light to turn off, when the capacitors no longer hold the current. So it means my pc should not turn on rgb light at night random. Only if for some reason there is still current in the capacitors. I just want to know if its normal or not. Or how is that capacitors randomly have enough current left to flash. Because I feel like something is wrong with my pc. Games feels choppy. I tried so many things so I want to make sure all is correct.
 
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