X230 Type 2306 Lost Audio

Question

I have an X230 Type 2306-CTO (Windows 7 64) that has recently lost audio.
No program has working audio, nor do working headphones produce sound.
I have installed and ran Lenovo system update version 5.03.0005.  
I have also installed and ran the "Troubleshoot Audio Playback" troubleshooter for Windows 7.  It asks if I want to troubleshoot "Speaker/HP - Realtek High Definition Audio" or "Headphones - Bluetooth Hands-free Audio".  If I choose "Speaker/HP"  it "couldn't identify the problem", and if I choose "Headphones" it prompts me to "plug in the speaker, headset or headphone" even when headphones are already plugged in (it does not recognize plugged in headphones, and the troubleshooter stops there).
If I click on the speaker icon in my lower right hand tray, I can adjust the volume to 100%.  If I open the mixer, both Device and Applications are at 100% and not muted.  If I open Speaker/HP properties, device usage is listed as "Use this device (enable)".  If I choose the advanced tab and try to play a test tone, "Failed to play test tone" message is given.
Any help would be greatly appreciated.

Answer 1

Mithun,
When I went into my “Manage Audio Devices” (at work) I noticed three devices:
Headphones (Bluetooth Hands-free Audio, Disconnected)
S271HL (Intel(R) Display Audio, Default Device)
Speaker/HP (Realtek High Definition Audio, Default Multimedia Device)
I disabled the S271HL device, which then made Speaker/HP my default device.  I then double clicked on that device, chose the enhancements tab, and made sure the “Disable all sound effects” option was chosen. 
This did not restore audio.
Then, under “services.msc” was listed “Windows Audio” and “Windows Audio Endpoint Builder”.  I right clicked both of them and chose “restart”. 
This did not restore audio.
I then went to my “Manage Audio Devices” (at home), and the S271HL device was no longer listed.
I retried resetting the two items under “services.msc” (at home) and audio was not restored.
I then went to my “Manage Audio Devices” (at work, next day) and the S271HL device was listed again, and still disabled.
I then used CCleaner to run the uninstaller for Intel(R) WiDi.  After restarting my computer, I then returned to “Manage Audio Devices” (at work) and the S271HL device was still listed, and still disabled. However, audio still did not work.
I would appreciate any additional suggestions.
Kevin.