Spray contact cleaner right on the volume controls on thenTV right on the case. It's called CRC QD contact cleaner. Press then buttons and wipe up and down like a piano with your finger up and down the buttons until the contact cleaner gets in and cleans the contacts. Keep doing it and you will probably end up turning the TV off. But when it does go off and you turn it back on, your problem is Solved!
JJ