Hello! I am having a issue with a Kenwood TK-250 transmitting. It worked fine last time I used it, probably a year ago, and now its not doing much of anything when I push the PTT button. When you push the transmit button, the red LED flashes once, screen goes blank and comes right back immediately. Not sure why its now doing this. The battery is fully charged. I have looked through the programming software and cannot find anything that would be associated with this issue. Any help would be greatly appreciated!!!