Dell Latitude d600 no sound

I am kinda new to the computer world. I recently changed the motherboard in a latitude d600. Everything works fine except for the audio. I have tried to install the drivers for the onboard sound, but I get the message "Device object not present, restart the system and run setup again." I have gone through the BIOS and see the card in audio controllers, but have no way to enable/disable it. I am very much confused about how to fix this problem.
Is there anyone out there?
Is there anyone who really sees what's going on?

Thanks for any help you can give.
Andrew

Dell Latitude d600
1.3 Pentium M
Windows 2000 Pro
20 gig hard drive
Intel pro/wireless
Mobility Radeon 9000 32mb
Sound Card is intel a97 i think?

You could try setting the bios to performance default. This may enable the audio device.

Tried it. No dice. Thanks for the thought though.

You try updating the Bios. Be careful though.

What do you mean by careful?

If you get the wrong bios update it can f*** up you motherboard.

I see. I have the disk for latitude d600 version 16. This seems to be the latest version. Is it possible to use an earlier version without damaging anything?

You mean: http://support.dell.com/support/downloads/format.aspx?releaseid=R103802&c=us&l=en&cs=&s=gen

try updating with that. Also make sure your laptop is definatly D600

Finally got it. It seems that there is a problem with these units and bad modems. They won't recognize the onboard sound if there is a bad modem sometimes. Removed the modem and now I have sound. Thanks for your help.