my set does not have the mute featutre avaialbe for the user

I have had the the mute signal disconnected for a few years, the set
does pop on turn on and off but nothing bad enough to damage a speaker
and the speakers seem fine after several years.

But if there is an easy way to get into a menu and turn the mute off so
i can reconnect the mute signal, I would like to know that.

Please let me know where I can find this.

thanks

Mark