Help my 9CAF has lost its LED "lighting" several times while I have been flying. I tried to brighten the screen to no avail. After I land and kill the motor I shut off the radio and turn it back on and the screen lights is back on. This has happened 3 times in 150 hours of use. Is there a problem with this transmitter or is the radio set to do this after some time?
Thank You for your help,
Victor