There's not much to examine if you open it up. The sound functionality is embedded 
in the laptop's main board. The chip for that function could be bad. Since you have 
checked everything software-wise, that leaves you with a hardware problem.







On Wednesday, May 7, 2008 at 11:23 am, julianloui wrote:

>I am trying to troubleshoot a friend's Toshiba laptop

>which went soundless suddenly a few months ago. I have thoroughly checked practically 

>every place associated with sound inside the Control Panel. Windows XP  reports 
that 

>every device works properly.  The Device Manager and all Services appear running 

>OK.  The CD drive and iTunes appear to function normally but there is still no sound. 

> I have even replaced the original Realtek HD Audio driver with a new one to no 
avail.

>

>However, I found a clue when I tested the Voice Recording/Playback features.  Even 

>though their associated tests were reported as passing by Windows XP, the microphone 

>test  and playback test failed to cause the green column to register in response 

>to a

>voice input or a playback output.  In other words, normally these columns synchonize 

>with the volume of the voice input or the playback sound.  Actually in my case, 
the 

>green column did attempt to move up a wee bit.  I tend to think that there is a 
hardware 

>problem prior to the speakers.  Since the machine does not belong to me, I try not 

>to open it up to examine the hardware yet.  I would like to know if anyone has come 

>across such a no-sound problem.  

>Thanks for listening.

>

>Julian  
 

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