HP CD-Writer Plus Internal 9310i Drive - Manual (Page 13)

How to Connect an Audio Cable 11
Next, connect the other end of the audio cable to the sound board inside
your computer.
Tips for connecting the audio cable to the sound board
■ Identify the sound board.
To identify the sound board look for microphone connectors on the back
of your computer. The circuit board inside the computer attached to the
microphone connectors is the sound board.
■ Identify the audio connectors on the sound board.
The audio connectors have four prongs and are often on the outer edge
of the sound board. On many sound boards the connectors for the audio
cable are labeled CD IN.
The audio cable may connect horizontally or vertically to the sound
board. The connectors only fit one way. If a connector doesn’t fit, try
turning it around.
■ Some sound boards have more than one audio cable connector. If when
you turn your computer back on you get no sound, try using a different
connector on your sound board.