Replaced my dv2000 motherboard, now sound does not work

Hello, I am new to this forum:

I recently replaced the entire motherboard in my HP Pavilion dv2000 laptop computer (runs Windows XP).  The part I replaced was "HP Spare 417035-001".  However, I did not replace it with the exact same motherboard.  Instead, I used a COMPAQ 440777-001.  This may have caused some problems.

There is no volume control on the task bar, the Control Panel indicates "No Audio Device" "No Playback Device" "No Recording Device", and most strangely of all, the manual volume control on the keyboard--with little touch buttons for sound control and Quickplay--make an unusual shrill chirping sound and do not work when I touch them.

This is especially strange because even when the broken motherboard was still in the computer, the manual volume control and Quickplay buttons still made the normal beeping sounds. What is up with that??

The package did not include any driver CDs, instructions, or anything other than the motherboard itself.

I have attempted to go onto COMPAQ's website to find drivers, but it redirects me to HP. Then I downloaded the audio driver from HP, but when I try to run the installation wizard, it brings an error message:
"Driver Installation Failed: Could not find the MEDIA device for this driver."

I have attempted to simply Reinstall the sound driver in the Device Manager, which actually shows a problem with "Audio Device on High Definition Audio Bus". This is a Conexant High Definition Smartaudio HD2. The reinstallation does not work, and states it "cannot find the necessary software."

All I can obtain from a search for KB888111 is that KB888111 is impossible to obtain.

Thank you very much for the link.  I downloaded the .exe file, saved it to my desktop, and ran it. 

It ran some kind of program for 2 seconds (I saw a loading bar) when suddenly an error box appeared:

Sorry, but it seems that this is not the answer to my problem. 

Don't worry, I've used the Device Manager lots and lots already.


There are two drivers that have a caution yellow [ ! ] symbol on them:


The first is listed under "Other Devices".
This menu opens up to a submenu with one item, "Modem Device on High Definition Audio Bus".
The properties say that the location is Location 65535.
The device status says "This device is not configured correctly. (Code 1)  To reinstall the drivers for this device, click Reinstall Driver.
Clicking this button brings up the familiar Hardware Update Wizard.
If I click "Automatic Install", it says that "The hardware was not installed because the wizard cannot find the necessary software."
I have tried to install the Drivers suggested above using the "Advanced" method, but it does not work.


The second driver is listed under "Sound, video and game controllers".
This menu opens up to a submenu with several items:  Audio Codecs, Audio Device on High Definition Audio Bus, Legacy Audio Drivers, Legacy Video Capture Devices, Media Control Devices, and Video Codecs.
The item with an error is "Audio Device on High Definition Audio Bus".
Again, the properties state that the location is Location 65535, and "This device is not configured correctly. (Code 1)". 

Automatic Install cannot find the necessary software. 

I do not know what to do!  I've downloaded so much stuff on my computer, it's hard to tell which drivers are ones I've tried and in what order.  I keep running all kinds of programs and install wizards, and sometimes they seem to do something and require a restart, but I can always tell they don't work because the sound bar volume control still makes that high-pitched "beeep" when I touch it, so I know there is no volume control. 

Thanks, but that option is never provided. 

I even downloaded some "Driver Detective" software to search online for missing drivers for me, and while it DID identify my two missing drivers, it required me to pay $30 in order for it to actually do anything about it.  So... I deleted it with indignant rage.  I'm not about to pour $30 into something that *might* fix my computer.