ASROCK Z77 Extreme3 Quick Installation Manual page 14

ASRock Good Night LED
ASRock Good Night LED technology can offer you a better en-
vironment by extinguishing the unessential LED. By enabling
Good Night LED in BIOS, the Power / HDD / LAN LED will be
switched off when system is on. Not only this, Good night LED
will automatically switch off Power and Keyboard LED when the
system enters into Standby / Hibernation mode as well.
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ASRock Z77 Extreme3 Motherboard