This volume lock is a real problem for me since I cannot seem to get the setting to "enable" I have gone through the procedure and of course the sound rockets up as soon as you go into the Test/Power menu, but once changes are made and system is restarted the volume returns to the low level. I am using the latest firmware and it is set for US and sp is off, but the damn thing just returns to the old sound, the way I know this is by listening to the music ramp up again upon entering Test menu,,,,,what gives help.