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The chelton screens need cooling. They over heat and do exactly what you said. I've flown several airplanes with the same problem but fixed by additional airflow. The small Dynon does that too. Most builders put avionics cooling fans in but forget to let the hot air out. You really have to have small muffin fans on the glareshield to help avoid these kinds of issues. If you only have say a Dynon as your backup and you lose cooling, then you will likely lose both primary and backup. Ron
Sent from my iPhone
On Aug 15, 2011, at 7:42 AM, John Hafen <j.hafen@comcast.net> wrote:
This weekend, flying back to Seattle, directly over the Sawtooth mountains over Salmon Idaho, fat dumb and happy, on auto pilot at 16.5k feet in VFR conditions, I hear in my headset, "GPS Unavailable," after which my moving map Chelton re-boots itself, turning white, then black, then black with text, then it finally re-boots itself with all of the information except the ground map representation, which returned after a few minutes.
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