I would think that if the QMX+ firmware can execute a bootstrapping power-on sequence, it could trivially be programmed to restart itself, but indeed that is beyond my level of familiarity.
Regarding the relay idea, how would this work?? Interrupting supply power to the QMX+ probably just turns it off, in which state it remains unless the power button is pressed (is this correct?).
Carl Willis (KF4KIG)