Fired up my RV6 today. Once Avionics power was turned on my GTR 200 screen illuminated, but no led info - basically a blank screen. The radio transmits and recieves fine. I can change the freq by counting the clicks. This is my second GTR 200. With my first GTR 200 the volume slowly decreased to 0 and never came back (volume knob was unresponsive). I got the current radio after turning in the first (out of waranty) and then paying $400. for a "reconditioned" GTR 200. Not real pleased with their reliability.