dell no sound

so i have a dell dimension e520 desktop , and my sound seems to be lost , when i go to
start - > all programs -> accessories ->entertainment -> volume control it says
There are no active mixer devices available. To install mixer device, go to Control panel, click Printers and Other Hardware, and then click Add hardware.
this program will now close.
and there is no speaker icon in the list next to the clock.
control panel - sound - all of the options are gray
i thought it was the onboard audio card , so today i bought one , and still there are no changes .

 

Have you tried going to the device manager and see if theres any yellow question marks under audio?Im going to guess that you are missing the audio drivers.You can get the correct drivers for that model by going to dell support drivers and downloads and use your service tag and it should give you all the correct ones needed.

 

yes there is , one i have my windows in russian and i guess it was WINMM something and after the first post i did reinstall windows and reinstalling everything did help i did have sound after all the drivers were installed but today i was switching from the onboard to the one i bought and again i have no sound :/