After turning on the digi 002 it will not stop "switching"

when powering on, you usually hear a "click" and the control surface goes into mute mode, right? well, in this case, the unit will "click" back and forth, never setting up in mute mode. this sounds to me like some sort of weird power supply issue. i tried leaving it completely unplugged overnight and it is still doing it. although, it took a while for it to "click" into this disfunctional mode after i let all of the capacitors drain. but after it did it, it would happen every 5 minutes or so. has anyone else dealt with this??