HP Pavilion DV4000 Hardware And Software Manual page 119

Modem and Networking
To connect a network cable:
1. If the network cable contains noise suppression circuitry 1,
which prevents interference from TV and radio reception,
orient the circuitry end of the cable toward the notebook.
2. Plug the network cable into the network jack 2 on the
notebook.
3. Plug the other end of the cable into an RJ-45 wall jack 3.
10–8 Hardware and Software Guide