i have Dell Vostro A840, when i formatted and reinstalled all drivers in Windows XP then it was unable to install 'Conextant Audio CX2056-12Z Rev: A00' from dell cd, after successfully extracting all files an error is displaying like "Driver Installation Failed: Could not find the MEDIA device for this driver." please help to install audio driver, because my laptop speaker is not working without it.
> First download and install Compaq sp32646.exe [Microsoft Universal Audio Architecture (UAA) Bus Driver for HD Audio]
(or go to Microsoft article 888111 and follow a link within the article to where you request the UAA file from Microsoft.
> Next download and install Conexant XP audio driver R192894 (220.127.116.11, A01)
"You need the right driver."
It is the one I provided a link to. I don't think it can be found by Service Tag number because Dell does not support XP on the A840; however if one checks out the "Compatibility" of the driver it is listed for 3 models including the A840.
"If you have the right driver there is no way you can't install it."
After working this board for years I can tell you that just having the correct driver does not ensure an installation.