Radio works fine with the 10 khz jump switch on but it jumps down. For example ch 20 is really channel 19. With the switch off it goes to 24685 with no transmit and when you change channels the frequency does not change. This happened when I dropped the microphone connector board on the main board just beneath where the microphone board mounts. Yes with the radio powered up. Shoot me again. Must have shorted something. By the way I had just changed D77. I was testing the radio. The receive was out. The receive works now. That's how I dropped the microphone board. Any ideas what components to check?