Missing Audio Device in the Device Manager

I have a Toshiba Satellite L755-S5248. I just recently loaded Windows XP Pro on it. I've managed to find most of the XP drivers for it by looking up the VEN/DEV ID's. Everything is installed and working except for the sound. There is no audio device in the device manager. According to the device manager, everything is installed. The audio is enabled in the system BIOS. What could cause this problem? Is there a way around it?
active_datacommAsked:
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active_datacommAuthor Commented:
Read a suggestion in another forum that it could be a problem with the way SP3 handles audio devices. Installed Windows SP2. The audio device showed up in the device manager, and I was able to install the proper driver. When I updated to SP3, however, the audio quit working, and the device went missing again. I don't have the laptop in-shop anymore, but that was definitely an enigma.
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andyb1rdCommented:
download these drivers http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/download.jsp?ct=DL&soid=2195831&ref=EV
then do a check hardware in device manager so go to start right click my computer choose manage then from computer manger on the left hand side double click device manager on the right hand side right click your computer name then scan for hardware changes. if it sees you device it will ask for the drivers so have them ready from the download above. and that should do it
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active_datacommAuthor Commented:
No devices appear in the device manager if I scan for hardware changes.
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nobusbiljart fanCommented:
ok - if the audio is nable din bios, and you don't see any audio device in device manager - and no problem device, that means there is no audio device seen

you can test if the audio works when booted from a live Knoppix cd : ftp://ftp.gwdg.de/pub/linux/knoppix/KNOPPIX_V6.7.0CD-2011-08-01-EN.iso   

 what can you try : reset the bios, or upgrade it

or use a nother audio card : http://www.nextag.com/audio-card-laptop/compare-html
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andyb1rdCommented:
its possible the drivers for the audio device are already installed but dont show as windows doesnt show all drivers it has been connected to (this can cause conflicts as there might be more than one version so xp cant run the correct version so doesnt display hardware) . to see all the driversfor windows xp. go to safe mode then look in device manager you will then see all the drivers xp has for the hardware devices it has loaded in the past. see if you can see your audio device then and remove it or them if there is more than one version of audio device. reboot then scan for new hardware again.
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active_datacommAuthor Commented:
Hope this helps somebody in their search...
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