Audio disappeared

[cbrace]

I have a Toshiba laptop Satellite M55-135. All of a sudden the audio disappeared.
I checked the device manager and it says everything is working and the mute is off.
I'm kind of a newbie so would appreciate any help. Thanks,
Charl

 

[treetops]

Did you check your volume control in your control panel?

 

[cbrace]

Yes. everything is fine.

 

[cbrace]

yes. the bars are right up to the top.