i just got my mute button all sodered up and working. (rj11 phone line, black and yellow wires to momentary switch) now whats bothering me is that when i hit the switch this morning, my display goes blank til i let off the switch, shows A, then will go back to the reading it had before with band, strength and how many within another quick blink of an eye. is this normal or do i have something fudged on the wiring. i have the hardwire, and the mute is in the accessory slot. i dont have a conceiled display hook up yet as that is arriving today.