My macbook isn't making any sound

There is no sound, and no start up sound and the only option in the sound preferences in 'Digital Out' is 'optical digital-out port'.

Mandrake,
There are a number of things that can cause this, here are some of the most common remedies.
Try looking in the headphone port and see if there is a red light, if there is, take a set of headphones and plug them in and out several times, there is a micro switch that sometimes gets hung up and this can help free it up.
Also you can try a pram reset:
Power off the mac, power it back up and hold the following keys immediatly, option, command, P, R (no commas)
which should make the start chime sound, continue to hold these keys till you hear the chime 2 times, then release. Reboot.
If no joy, try going to applications>utilities>Audio MIDI set up, and make sure that internal speaker is selected.
Hope this helps,
SJP

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