When asking questions on this site, it is most helpful to those of us who try to answer your question if you would provide Make and model # of the product you are inquiring about. So many TV use different modes of menus etc. that your most general question is impossible to answer without you providing more information.
Thank you.
Have you checked your MUTE Button?
Have you checked your Connections on the Back?
Does the Numbers go UP and DOWN?
Have you Recently unplugged the TV?
Is this a NEW TV and you need to go into the SET-UP? ( I had to recently do this with my SCEPTRE TV)
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