Internal Speaker is disabled and does not show up under device manager (only in hidden devices)

[chrisV108]

This laptop suddenly stopped working using the internal speakers. There is an X next to the speaker symbol and the Realtek audio only shows up under hidden drivers. 

1. Made sure that the Windows Audio service and Realtek Audio Universal service  are running and  in automatic mode.

2. The only devices under sound and controllers is a Bluetooth head set (A5).

3. It says "No output devices found" under sound output

4. The HP trouble shooter states I don't have any audio device connected, but when I ran a different test, the sound came through (diagnostic mode).

please suggest some solution to this problem

Thanks

[chrisV108]

SOLVED: 

[chrisV108]

SOLVED:  I found that the Intel Smart Sound technology OED was not starting (under device conflicts). I rolled back the driver and now the sound works.