Internal speakers no longer available under 10.4.8

After I updated to 10.4.8, my computer seemed fine, and I was able to play sound, until I restarted it. Now it doesn't regonize my internal speakers. When I try to play anything, the red light in the sound out jack comes on. (any there is sound if I plug in external speakers.) I tried to adjust the sound out options in the control panel, but my internal speakers are no longer available! I know they are still working, because the computer chimes at startup, and they were working just a few hours ago. I tried restarting, zapping the PRAM, but all to no availe. Any ideas?

On Sep 27, Xanthene posted this:
"Solved! For all those that get this problem. Plug your external speakers into your line in input and wiggle it around a bit. I did this on my and the red light from the digital out turned off and my sound was back."

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Internal speakers no longer available under 10.4.8

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