February 29, 201610 yr Hi Dave, In the COM Frequency window pop-up when you click the "other" COM button, the indicator bar in the button you clicked on changes color to green, but the Active Freq, Standby Freq, and text located in the top center of the Frequency window pop-up won't change until you close and re-open the window. The text is Com1, or Com2 The volume button controls do not seem to work, the mute button does work The NAV Frequency pop-up window works the same way. Thanks, Mark Mark Zanzig
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