No Sound on Powerbook 12"

[markintosh]

2 Days ago the sound just stopped working on my 12" 1.5Ghz Powerbook.
Has worked fine since the day I got it. No problems when upgrading to Leopard, it just quit out of the blue.

When I use the volume keys on the keyboard, I see an icon that looks like the circle with the line through it. I check in sounds in the System Preferences and it states that there is not an output device. The system profiles shows the sound card.

Any ideas anyone?

 

[mad jew]

Try resetting the PMU.

 

[iSaint]

This happened on my 15" Powerbook after a Leopard install. A simple restart fixed it. I know there have been a couple of other G4 users on MacRumors that have resolved same issue this way.

 

[saxman]

Have you plugged headphones or external speakers into it recently? A few times on my PB when I unplug it, it still thinks I have and external speaker hooked up. I have to plug in the speakers and then unplug them again.

I haven't done much experimentation on why this happens, but it's happened to me about 3 times and plugging speakers in then unplugging them have worked. Maybe I just have a wonky port

 

[markintosh]

Thanks!

Thanks for the advice everyone!
Resetting the PMU worked. (Just glad I don't have to reinstall the OS - I'm used to doing that as an old Windows user )