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.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?
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.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.