Futaba channel 3 problem
 

I race off-road and oval. Only using 3rd connector on receiver for transponder.

On every model, my futaba main menu shows channel 3 with a black bar towards the right. If i access channel 3 menu, the posi is set to D100, If I change it to 0, the black bar on the main menu goes away, but when i turn the radio back on, it's back at D100.

Any suggestions ??