The user manual f HTL5120 stated that...
"When you change the treble or bass level, all the indicators on the main unit blink one by one. If the treble or bass level is set to the minimum, all the indicators turn off."
However, my unit does not work like that. It only has v.surr light up for a moment when bass/treble is pressed. Nothing else. There is no indication of bass/treble level. Is my unit faulty?