Problems with onboard sound card

Sound doesn't work at all on my computer. It did a couple of days ago, when I had Windows XP Home Edition (I just bought this computer), but I replaced it with Professional, and since then the sound hasn't been working. The problem is, it can't detect the sound card. It's not in the device manager list, and when I go to control panel>Sounds and Audio Devices, it tells me that there is no audio device. This is kinda perplexing, because this sound card is integrated into the motherboard, and there shouldnt be any trouble detecting it.

It is a "Integrated 7.1 Capable Intel(R) High Def. Audio" card (thats from the specs on HP's website). I can't find any drivers for it on Intel's website, and it seems otherwise nonexistent or undetected on my computer.

In device manager, there are a few problem devices. They are sub-listed under "other devices.":
PCI device
Universal Serial Bus (USB) Controller
Video Controller (VGA Compatible)

Those all have the yellow exclamation marks, so maybe its possible it has something to do with on of those?
I asked a friend of mine, and he said that when I reinstalled XP, it probably accidentally erased some of the drivers for the motherboard. He said that to fix this I would need to download the correct drivers for my chipset...I dont know if this is correct but if it is, how do I tell what chipset I have?
Thanks

Since you bought this computer, it should have come with some sort of recovery CD and/or driver CD that would contain the drivers needed for your computer.

Also, knowing what kind of computer (dell,hp,compaq) it is, would help.

That is why I don't use onboard.
You could also contact the company

it did not come with a CD.
Well....it came with a 3-month AOL trial, but thats beside the point.

theres some confusion regarding the make and model. I am pretty sure I bought an HP Pavilion a1200y. However, the label on the CPU says that this is an a1000y. So I think maybe they just put the wrong casing on...because the a1000y comes with a motherboard that only supports pentium 4 processors, and I have a Celeron D 3.06 GHz. I'm almost 100% sure that I have the a1200y and not the a1000.

Running XP Pro, 512MB ram, 2 80 GB hard drives, onboard audio and graphics, etc etc. HP's site tells me that my chipset is an ATI Radeon Xpress 200 (the intel version) but I can't find any drivers for this chipset on ATIs or HPs website.

You bought an HP and it didn't come with any CD's other than an AOL disk? Odd considering, my compny just bought a bunch of HP desktops for a project that came with all kinds of disks. But anyway

Is this your PC. If so there are the drivers for your audio and video on that page.

How hard did you look on HP's site. All I did was do a search for a1200y and found all I needed, you can even order recovery CD's.

And by the way, a Celeron is basically a cheap P4, they both use the same socket.

actually, I did find that page on HPs site, but it says "You must install Microsoft's Universal Audio Architecture High Definition audio bus driver on the PC before installing these drivers.", and that is what I had trouble finding. When I google it or go to microsoft's site, they give me plenty of info about uaa, but not the download page for the driver.

Here is what you do, I just did this and I have it, search your system for these files:

Hdaudbus.sys
Hdaudio.sys
Hdaprop.dll
Hdaudres.dll
Hdashcut.exe
Mssap.dll
Portcls.sys

Right click the file and select properties. Click the version tab and make sure it matches the version found here. If they match then you already have this update and you can download the driver. for your sound

This came out in 2004 and I am sure it was included in a hotfix or critical update somewhere down the line.

i know that I definitely don't have it because I downloaded that realtek driver and tried to install it, but it told me that I didn't have UAA installed on my computer, and to get it from microsoft...the only question is, where do it get it? oO

I just did a search on my 2003 Server and I have the files I listed and I don't know of any reason why I would have it.

When was the last time you went to Windows Update? Hvae you installed SP1 or SP2 yet?

yes, i'm totally updated and everything. I don't know why I don't have these files. (I have sp2)

Contact Microsoft is the only thing I can think of at this point.

if you uploaded those files from your computer and I downloaded them, do you think that would work?

I have the same problem since I've Re-installed Windows XP Home Edition.
My Motherboard is an ASUS P5AD2-E Premium with an integrated 7.1 Sound Device.
It doesn't work now.
I don't know if it's due to the Windows Update from Internet or not ...because I've upgdated Windows XP to SP2 before installing all the ASUS MotherBoard Drivers.
Please post any solution to this problem. I will post something as soon as I will have solved the problem.

If it's an HP, you should have a cd with all the drivers on it. You can also remove all items with a yellow exlamation next to them in device manager. Then shut down your computer the restart your computer and see if XP Pro detects the hardware right that time.

Good Luck...........

1. It's not part of SP2
2. It's not available through Microsoft\Windows update

3. It should be part of the drive package (on the CD that everyone is talking about)

There is a link on HP's web (Not sure exactly where it is for Home pc's) that will allow HP to scan your pc and tell you EXACTLY what you have.

While Microsoft list the KB article (888111) fro the UAA patch, i have yet to locate it. It does load with the "universal audio driver". You might want to search HP for SP-30301. See if it applies to your PC.

Good luck