Hi, I have the Magnovox #TB100MW9 converter box for our bedroom tv. By accident I found out it is putting out a low audio signal from the composite outputs even when its in standby. When playing our dvd player we can hear faint audio. When I disconnect the red and white cables from the box the audio goes o.k. Will this hurt anything if I leave it on? She only uses it on the weekends. My return window is long gone. Thanks.