HP C709TU, C721TU, C725BR, C718TU Muting speaker sound fn+home, Increasing speaker sound fn+pg up

Playing next track or section of an audio CD or a DVD (fn+f12)

While an audio CD or a DVD is playing, press fn+f12 to play the next track of the CD or the next section of the DVD.

Muting speaker sound (fn+home)

Press fn+home to mute speaker sound. Press the hotkey again to restore speaker sound.

Increasing speaker sound (fn+pg up)

Press fn+pg up to increase speaker sound. Hold down the hotkey to increase speaker sound incrementally.

Decreasing speaker sound (fn+pg dn)

Press fn+pg dn to decrease speaker sound. Hold down the hotkey to decrease speaker sound incrementally.