Upgraded from PD3.0 to PD4.0 and now now sound, Windows XP (SP3), parallels VM Configuration/Hardware doesn't even have a Sound section. No sound devices in XP Device Manager. Reinstalled Parallels tools, no change. Submitted this as issue on 11/29, no response whatsoever....
Yes, this may be the case, initiate scan for hardware changes and provide Windows XP disk, note it should be OEM disk
Tried Scan for hardware changes from Device Manager, it didn't actually do anything, no change. Sound still missing from Virtual Machine configuration and no sound
Submitted same info to Parallels support as case #635114, got reply indicating that they didn't even read the request...
so Sound just needed to be added to VM Configuration (+ button). Somehow it was never enabled in migration from PD3.0.