My Dogtra 1200NC has quit working on me. The blinking light on the rcvr is ok. 1 blink every couple secs. The light on the xmtr shows to be ok. blinks for push of momentary, constantly on for push of constant button. The rcvr light will not light up for any push of the button. The test light will not light up for anything. I went ahead and put it on the charger last night, but no change after a 14 hr charge. Any suggestions? This is my only collar and I'm not wanting to be w/out one if I don't have to be.