HP Pavilion DV4000 Hardware And Software Manual page 178

Specifications
The following table identifies the input and output signals
supported by the expansion port 2 (select models only) on your
notebook.
Not all docking devices will support these features.
Feature
USB 2.0
10/100 Ethernet
Gigabit Ethernet
IEEE 1394 (4-pin port)
Consumer IR
(for optional remote control only)
Power inputs
Composite video
S-Video
Component video
S/PDIF audio
DVI
Headphone/speaker audio-out
Microphone audio-in
17–4
Support
Yes
Yes
No
Yes
Yes
(select models only)
65 W
Yes
Yes
Yes
(select models only)
Yes
No
Yes
Yes
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