Approx. 2 or 3 times a day my wifes VIP722 will begin running on it's own. Not the reboot running but a low hum in the background (no lights). It takes a soft reboot to end the hum. It bugs her and in turn I must get bugged. I'm sure you understand. I have the software reset set for 0900 and it does fine at that time, but will do this other thing at any hour. Is the unit going out? Thanks