HP dv4-2160us manual Front components, Rear component

Front components

Component		Description
(1)	Power light	●	On: The computer is on.
		●	Blinking: The computer is in the Sleep state.
		●	Off: The computer is off or in Hibernation.
(2)	Battery light	●	On: A battery is charging.
		●	Blinking: A battery that is the only available power source has
			reached a low battery level or a critical battery level.
		●	Off: If the computer is plugged into an external power source,
			the light is turned 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.
(3)	Drive light	●	Blinking: The hard drive or optical drive is being accessed.
		●	On: HP ProtectSmart Hard Drive Protection has temporarily
			parked the internal hard drive, and if present, the hard drive
			in the SmartBay.
(4)	Consumer infrared lens	Receives a signal from the HP Remote Control.
(5)	Audio-in (microphone) jack	Connects an optional computer headset microphone, stereo array
		microphone, or monaural microphone.
(6)	Audio-out (headphone) jacks (2)	Produce sound when connected to optional powered stereo
		speakers, headphones, earbuds, a headset, or television audio.

Rear component

Component	Description
Vent	Enables airflow to cool internal components.
	NOTE: The computer fan starts up automatically to cool internal
	components and prevent overheating. It is normal for the internal fan to
	cycle on and off during routine operation.

10 Chapter 2 Features