HP 375424-001 manual Expansion port 2 describes

Component ID

Component		Description
4	Expansion port 2	Connects the notebook to an optional
	(select models only)	docking device.
		✎ The notebook has only one
		expansion port. The term
		expansion port 2 describes the
		type of expansion port.
		✎ For expansion port signal
		information, refer to “Expansion
		Port Input/Output Signals
		(Select Models Only)” in
		Chapter 17, “Specifications.”
5	USB ports	Connect optional USB devices.
		✎ Number of USB ports vary by
		model.

61394 port (4-pin)

Connects an optional 1394a device such as a scanner, a digital camera, or a digital camcorder.

7	External monitor port	Connects an optional VGA monitor or
		projector.
8	S-Video-out jack	Connects an optional S-Video device,
		such as a television, VCR, or video
		capture card.
9	Audio-in (microphone) jack	Connects an optional stereo
		microphone.
-	Audio-out (headphone) jack	Connects an optional headphone or
		powered stereo speakers. Also
		connects the audio function of an
		audio/video device such as a television
		or VCR.

1–12 Hardware and Software Guide