No sound

My OS is win 7 prof 64 bit and my pc is a Lennovo M72E.  I had an external speaker connected, which I removed as the sound quality was so bad.  This speaker was connected to the front of the pc.  The speaker was : DTSS 2400 Theatre Sound System FPD 2485 W.  
But now I cannot get any sound at all even from the build in speakers, not sure whether there are any.  
Hope the Gurus can please throw some light.  Thank u.
jegajothyretiredAsked:
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Michael-BestCommented:
Use this tutorial to help you identify and fix common sound problems in Windows.
By windows.microsoft.com

Link:
http://windows.microsoft.com/en-us/windows/no-sound-help#no-sound=windows-7&v1h=win8tab1&v2h=win7tab1&v3h=winvistatab1&v4h=winxptab1
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rindiCommented:
Desktop PC's generally don't have speakers built-in. You will have to use external speakers. For theatre sound systems which have more than 2 speakers, you also need a sound card that supports 5.1 audio or similar. If your PC doesn't have such a sound card (usually with such sound cards have several audio jacks at the back so you can insert all the necessary cables). If your sound card only supports stereo sound, it is best to just get a stereo speaker system. Make sure you get an active speaker that has it's own external powersuply, and the speakers usually sound better if they are larger, as that outputs better bass sound.
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JohnnyCanuckCommented:
There are many business class computers (Dell, Lenovo) that have a built in speaker.  This is not the little button speaker that you find on motherboards to give beep codes for POST problems.  Windows 7 doesn't seem to work with the speakers in these machines.  One way to get them to work is to uninstall the sound drivers and then install the drivers for Vista.  Other than that, I don't know of another way to get them to work.
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nobusCommented:
connect the speaker in the back of your PC - usually the green colored output
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jegajothyretiredAuthor Commented:
thank u for the fix.
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