Basically I have a Toshiba A75 series and the sound does not work.
The AC97 sound driver shows as working properly but the Device Volume is greyed out, and I cant test the sound.
OK here is what has been tried.
Reinstalled Toshiba drivers - nope
Installed latest Realtek drivers - nope
Restarted sound service within the registry -nope
Check "physical" issues (volume turned down, keyboard fn sound key etc) - nope
Reinstalled XP from a fresh format and reinstalled Toshiba drivers - nope