HP AW389USABA, FN023UAABA manual Front components, Source, the light turns off when all batteries

Front components

Item	Component	Function
(1)	Wireless light	●	Blue: An integrated wireless device, such as a wireless
			local area network (WLAN) device, an HP Broadband
			Wireless Module, and/or a Bluetooth device, is on.
		●	Amber: All wireless devices are off.
(2)	Power light	●	On: The computer is on.
		●	Blinking: The computer is in the Sleep state.
		●	Blinking rapidly: An AC adapter with a higher power rating
			should be connected.
		●	Off: The computer is off or in Hibernation.
(3)	Battery light	●	Amber: A battery is charging.
		●	Turquoise: A battery is close to full charge capacity.
		●	Blinking amber: A battery that is the only available power
			source has reached a low battery level. When the battery
			reaches a critical battery level, the battery light begins
			blinking rapidly.
		●	Off: If the computer is plugged into an external power
			source, the light turns off when all batteries in the
			computer are fully charged. If the computer is not plugged
			into an external power source, the light stays off until the
			battery reaches a low battery level.
(4)	Drive light	●	Blinking: The hard drive or optical drive is being accessed.
		●	Amber (select models only): HP 3D DriveGuard has
			temporarily parked the hard drive.
(5)	Display release latch	Opens the computer.
(6)	Speakers (2)	Produce sound.
(7)	Audio-out (headphone) jack	Produces sound when connected to optional powered stereo
		speakers, headphones, ear buds, a headset, or television
		audio.
		NOTE: When a device is connected to the headphone jack,
		the computer speakers are disabled.
(8)	Audio-in (microphone) jack	Connects an optional computer headset microphone, stereo
		array microphone, or monaural microphone.

14 Chapter 2 External component identification