You may have to use Fn + another key (for e.g.
In case of laptops, check if the built-in keyboard works and also verify if the volume keys on it are working.Do all the other keys on the keyboard work?.If your speaker has a volume wheel or keys, ensure that it is not turned down all the way.Does the volume slider on the system tray change the sound level?.Try plugging in some headphones or a different speaker if possible.Check whether the speaker/sound card that is connected to the computer works.
