My TV, Sharp Aquos 42", won't register a visual display for my volume changing all of a sudden. Usually there is a little strip show it, and now there is nothing. The volume still will go up and down though. Also, it won't let me click into the tv menu, as I tried to get into the menu to see if there was something to change there. Thanks

Televison & Video - Sharp - Aquos - Aquos LC-46D62U 46 in. LCD HDTV