If the computer doesn't have a sound card, then it's using on-board sound. You may have to reboot and go into BIOS to see if it's been somehow disabled. If it has been, and you enable it, it may not be what was causing the problem. I seriously doubt it's been disabled, but once again worth a look see.
Something is missing. You might try going to Windows Update and checking to see if any audio updates are found under OTHER. (I think that's what the category is called).
I just thought of something, usually when everything you mention is grayed out, it's because the drivers aren't installed. Check Windows Updates. Do this before going into BIOS. Even if it has been disabled there, the drivers would still be installed.
Edited by Queen-Evie, 25 February 2007 - 06:33 PM.