To adjust the volume using the Fn key

Press the F3 key while holding down the Fn key to turn down the volume. Press the F4 key while holding down the Fn key to turn up the volume.

Alternatively, press the VOL (Volume) buttons (Parts and Controls on the Back) on your VAIO computer to adjust the volume.

To turn off the volume using the Fn key

Press the F2 key while holding down the Fn key to turn off the volume of the speakers and headphones.

Press the Fn+F2 keys again to turn on the volume.

Alternatively, press the Fn+F3 or Fn+F4 keys to turn on the volume.