Am an able to load audio driver for Dell Vostro 1400 i downgraded my laptop with xp service pack 2

Have you down graded? Try Windows Updates. If so you will have to find the old XP driver one by one at the Component Manufacturer's website. It's a bit of a pain. That begs the question, "Why Downgrade?"

1. Click on the link 2. Choose the appropriate Operating System 3. Choose Audio and just follow the prompts

Go to Dell and then to your computer model and download the drivers

Here's the link... connexant audio cx2056-12z win xp driver Open the link and click on the "Free Download" button (an advert- page will pop up, just close it), wait for few seconds and again click "Free Download"
Good luck.
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i think your audio drivers has not installed so first installe the audio drivers through dell audio drivers website.

You can download the drivers from Dell WEB site, the support download page. Make sure you select your model laptop, better still, type in the Service Tag number, it is printed on the label on the bottom of the laptop. This will open the page where the specific drivers for your model laptop are located. Also make sure you select the Windows XP version of the driver for the Windows XP operating system.
Click on this link :-
http://support.dell.com/support/downloads/index.aspx?c=us&l=en&s=gen

If Vista:
Dell Vostro 1000 audio driver for Vista.

If XP:
Dell Vostro 1000 audio driver for XP., if it won't install then first reinstall Dell Vostro 1000 chipset driver..

If still having problems then reinstall all drivers from Dell Vostro 1000 downloads page in order written here.

You will get all the drivers for windows XP here :
http://www.laptops-drivers.com/dell-laptop/some-windows-xp-drivers-for-dell-vostro-a860-and-a840.html
Just download and install them.
Enjoy.
Pls rate my answer.

For using xp you must have the correct drivers. These should be available for download from the Dell support website. You may also find updating windows xp will help you may be using service pack one, so make sure all updates are done.

If you have to load drivers you should load the chipset first followed by the graphics then the sound. Check on your hardware list under system in control panel that there are no conflicts.

I hope this is helpful please rate the assistance given.

Did you download the latest audio drivers from Dell.com? If not here is the link to the drivers for that device based off Vostro 1400 using Vista 32 bit Edition. http://support.dell.com/support/downloads/driverslist.aspx?os=WLH&osl=EN&catid=3&impid=-1&servicetag=&SystemID=VOS_N_1400&hidos=WLH&hidlang=en Hope that helps. If not let me know.