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Paper Tape
Posts: 3
Registered: ‎02-14-2012
Location: UK
Message 1 of 3 (2,027 Views)

R400 No Sound after installing Windows 7

Hello All,


I have recently installed Windows 7 on a Lenovo Thankpad R400 which previously had Windows XP on.  Since installing Windows 7 the sound has not been working.  Windows 7 detected the sound chipset (Connextant SmartAudio) and installed it own driver,  I have also tried the Windows 7 driver from the Lenovo web site.  Both drivers seem to install ok but I still dont get any sound.


I have heard that the is a known issue with Windows 7 and the Connextant chip in R400, is this true?


Sound was working fine on Windows XP.


I would be greatful for any help or advice.


Thanks in advance


Retired Partner
Posts: 955
Registered: ‎01-05-2010
Location: INDIA
Message 2 of 3 (2,005 Views)

Re: R400 No Sound after installing Windows 7

Hello Steven,


Kindly update the BIOS and check if the issue resolves.


Please download the BIOS update for 32bit Operating System


Please download the BIOS update for 64bit Operating System


Best Regards,


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Microsoft MVP Contributor
Posts: 21,009
Registered: ‎12-19-2008
Location: Australia, Melbourne
Message 3 of 3 (1,998 Views)

Re: R400 No Sound after installing Windows 7

go into your sound property, is the speaker selected as the main playback device?

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft
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