Dell Inspiron 1521 (Mid 2007) - Manual (Page 70)

70
Using Multimedia
5 Plug the single-connector end of the audio cable into the headphone
connector on the computer.
6 Plug the two RCA connectors on the other end of the audio cable into the
audio input connectors on your TV or other audio device.
7 Turn on the TV, turn on any audio device that you connected
(if applicable), and then turn on the computer.
8 See "Enabling the Display Settings for a TV" on page 78 to ensure that the
computer recognizes and works properly with the TV.
Composite Video and S/PDIF Digital Audio
1 S-video TV-out connector 2 composite video adapter
1 2