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Volume controls locked

\015 About two years ago my daughter was trying to put the volume down and she accidentally locked them. We can't put the volume up or down and we can't hear a thing. Now we can't adjust the brightness and contrast controls either. Does anybody know how to solve it? Please help I'd like to listen to music again. :)\015

Answers :

I think you have muted the volume control. uncheck the muting of the speaker.
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