I have just installed a new hard disk and re-installed win98 and sounds now won't work. The sound card drivers all seem to be OK (no conflicts etc), but look in control panel / multimedia and it can't find any sound devices.
I have the old Hard Disk, and when I boot that up the sounds work fine.
Sounds straight from the CD ROM drive work fine.
I did remove all sound drivers and reboot - the sounds seemed to work OK. I rebooted and - hey presto - no sounds again.