Sound doesn't work (Realtek ac650) and control panel

[nabeelhameed]

hi ,
i was trying to fix one of my friends old computer. On that all of a sudden sound stopped working. sound files seems to be playing ,but no output comes through speakers or headphones.
I have done all the basic tests, and evrythng is fine. When i checked in control panel ->sound and audio->voeme tab , device volume ans speaker settings i can't use, it appears like disabled.
Pls note the audio drivers(realtek alc650) are properly installed. I have spent more than a day downloading and reinstalling the drivers and googling to find out the issue. But still in vain. Now i want to try reinstalling XP, but my disks r missing , so i need to give a try in this forum. Pls help.

 

[Jawshh]

Look in device manager if the sound device is enabled. If you don't see it, you might need to enable it in bios.

 

[nabeelhameed]

RE

Sound is already enabled in device manager. ...now what shoul i do ?

 

[Jawshh]

What is your motherboard's brand and model Number?

 

[nabeelhameed]

its MicroStar 6535 motherboard.
Its a Premio Calypso PC .

 

[Jawshh]

Uninstall the realtek AC97 audio from device manager. Restart you computer and Download drivers from here http://www.msi.com/index.php?func=downloaddetail&type=driver&maincat_no=1&prod_no=298

Install those drivers. Then, refer to the screen shots in attachments. Make sure the settings match with your computer.