Foe certain COMPAQ model such as V3000 and V2000, you need to install MS-UAA first and then install audio. NOT ALL V2000 require this patch, if you didn't try with direct driver installation you can get it here first, if that driver didn't work then use this driver.
1. First Install MS-UAA
Microsoft Universal Audio Architecture (UAA) Bus Driver for High Definition Audio (sp32646)
2. restart after installation
3. The Download and install AUDIO:
Download | Download (mirror)
If you still have problems leave your comment here and I'll assist you for further installation.