Hello all. After about 50 hours happy and incident-free use of my D6, it refused yesterday to start up. The screen keeps cycling between the Dynon splash screen and off. I cannot control/switch it off via the unit buttons, only with the avionics master switch. Bizarre as there have been no configuration changes on my aircraft, the weather has been mild, and I have not done anything by way of firmware updating. Any help/input/ideas gratefully received, Mike.