HP CD-Writer Plus Internal 9200i Drive - Manual (Page 12)

12 How to Connect an Audio Cable
The audio connectors have four prongs and are often on the outer edge
of the sound card. On many sound cards the connectors for the audio
cable are labeled CD IN.
■ Connect the audio cable.
The audio cable may connect horizontally or vertically to the sound card.
The connectors only fit one way. If a connector doesn’t fit, try turning it
around.
■ Some sound cards have more than one audio cable connector. Try using a
different connector on your sound card if you get no sound when you
turn your computer back on.