HP 2230s - Compaq Business Notebook User Manual page 13

(5) Volume mute button
(6) Volume down button
(7) Volume scroll zone
(8) Volume up button
(9) Fingerprint reader
Mutes and restores speaker sound.
Decreases speaker volume.
Adjusts speaker volume. Slide your finger to the left to decrease
volume and to the right to increase volume.
Increases speaker volume.
Allows a fingerprint logon to Windows, instead of a password
logon.
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