No Speaker audio - Headphone audio okay

[jrj350]

HP 200-5120IS
Intel Pentium E5400 / 2.7 GHz
Dual-Core 64-bit
Chipset Type Intel G45S Express
Data Bus Speed 800.0 MHz
RAM - 4 GB DDR3 SDRAM - Non-ECC
HD - 500.0 GB - Standard - Serial ATA-150 - 7200.0 rpm
Sound card - Integrated

My wife has a dual boot operation using Windows 7 and Ubuntu 14.04.

Here is the situation:
There is no audio in Windows 7 through the speakers.
The audio is okay in Windows 7 through the headset.
The audio is okay in Ubuntu speakers and headset.

I can't determine what happened to the audio through the speakers, in Windows 7. Troubleshooting has led nowhere.
Any possible suggestions woiuld be appreciated.
Thank you

 

[fireberd]

Does the HP PC have the correct sound driver for Windows 7? or is it only using the generic, basic function "HD Audio Codec" that Windows will install?

Here is the HP listing and the RealTek audio driver.

Software & driver downloads HP All-in-One 200-5120is Desktop PC | HP® Support

 

[jrj350]

@firebird
Yes, it has the correct RealTek driver. As I mentioned, the sound works perfectly through the headsets. Also, when clicking on the small speaker icon in the lower panel) the audio meter is registering, indicating audio is there.

 

[fireberd]

Check the Control Panel/Hardware and Sound and finally the Sound Panel Playback section. The "Speakers" should be set as the default Playback device. You can also test the speakers in that panel.

 

[jrj350]

@fireberd
Speaakers are set as default and I tried to test them but no joy. I feel there is no mechanical problem here because the speakers work very well in Ubuntu. I'll recheck those things you mentioned, just to make sure I haven't missed anything.
I do appreciate your inputs.