Hi all, I have an interesting problem if anyone can lend a hand. I had a first gen aluminum 13" Macbook that I spilled beer on. It was basically a write-off, but fortunately the HD was not damaged. I just got my 13" Macbook Pro today, and replaced the new HD with my old one. Everything is working fine, except that there is no sound. When I go to System->Sound I see "No Output devices found", and when I press the sound buttons on the keyboard, the speaker is grayed out. I know this is not a Hardware issue for a couple reasons. First, it properly 'chimes' on startup. Second, I did try running the computer with the new hard drive, and during the sound was working properly, volume adjustment buttons working, etc. Also, in System Profiler, the build-in sound is recognized. What I have done so far: Reset PRAM/NVRAM, used Disk Utility to Repair Disk Permissions, used onyx to delete any caches. Nothing has worked yet. So this has to be a driver issue related to Leopard. Is there a way I can re-install the sound drivers? Or go reinstall Leopard without losing any of my data? Many thanks! edit: I was going to place this in the Macbook Pro forum, but since this appears to be a software issue I posted here. Sorry if it's the wrong location.