My hunting partner's excal II went on the blink. Last time he used it was about 1 month ago. Last night he put it on the charger and let it charge for 10 hours. When he went to go check it he noticed the threshold knob was turned on about halfway. He turned it off and turned it back on and nothing, no sound, nothing. The battery is reading 14.10 volts so it's not the battery. He is going to send it to the repair shop in Florida but was just wondering if anybody has had this problem. Thanks....