One day there was no more sound and can't get it back (can not even remember when exactly it disappeared).
If I go under system -> sound and audio it indicated that all above mentioned hardware is working, but volume is completely grayed and i cannot change the volume.
Under DEVICE MANAGER it shows the following devices for sound:
Audiocodecs, Legacy-audiodriver, Legacy video, media controls, MEDION (7134) WDM Video capture, MEDION TV-Turner 7134 MK2/3, MPU-401-compatible MIDI, Realtek AC'97 Audio, standard game port, standard game port, Terra Tec Aureon 5.1 Fun, Videocodes (all of them are ready to use, no exclamation marks or other signs next to any of them).
Have a MEDION desktop PC with 2.67 gHtz Intel Pentuim 4, Main Circuit Board is from Micro-Star International MS-6701, Bus Clock 133 megahertz, BIOS Phoenix Technologies LTD 6.00 PG
I installed a sound card from Terra Tec Aureon 5.1 Fun, but for the sake of testing I disabled it under BIOS and only enabled the built-in sound card Realtek AC'97 Audio. I also downloaded the latest driver from Realtek website (version 188.8.131.5270) hoping that might fix the problem, but it doesn't.
Anybody got an idea??