All phono stages should have a readily accessible mute switch which should be used whenever manipulating the tonearm. If you have a mute switch on your preamp, that can be used in stead but, every system that plays records needs that mute switch.
It sounds to me that the Lingo does not have a relay on it's output and the OP is just hearing the power supply run down. If there is no noise in normal operation i is not a problem at all.