PC sound problem

January 4, 2012 at 05:47:21
Specs: Win 7 x86 build 7600, Intel Core 2 Quad 2.4GHz CPU, 4Gbb
A little while ago the sound stopped working on my PC - it appeared to be a corrupted Windows system file. I was planning to upgrade from XP to Win7 anyway (the system passed Win7 upgrade advisor), so I went ahead - but there is still no sound after a successful upgrade to Win7.

After trying other solutions I thought it might be a hardware fault in the onboard sound,
so I installed a cheap PCI sound card, disabled onboard sound in BIOS, downloaded and installed latest drivers from manufacturers website
but still no sound

Device manager shows C-Media PCI Audio Device working properly
Update Driver - reports best driver installed
So I uninstalled, scaned for hardware changes, reinstalled, etc
but still no sound

I have also checked:
- Volume level on tray turned up to max (no mute)
- PCI card audio configuration is set to 2 speakers, mixer at max volume etc.
- Speaker plugged in to green socket (and tried all the others!)
- Speaker power is on and volume max
- Speaker works OK on other computers
- Headphones and other speakers
- Win Audio service is started (on automatic)
- Win troubleshooter cannot find cause (surprise surprise!)
- dxdiag reports cmudax3.sys driver is not signed, but no other problem
but still no sound

I've run out of ideas - can anyone suggest anywhere else to check for problems?

Thanks, Mike

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January 4, 2012 at 06:05:44
The upgrade option is only available for win vista and not win xp.
Try different PCI slot.

You know the real meaning of peace only if you have been through the war.

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January 4, 2012 at 11:06:10
Sorry - should have said custom install (and reinstall all software and files).

Thanks for slot suggestion - I tried it but no improvement.

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