No Mic Selection Menu when Tx Menu knob Pushed In on Maestro

Mike KB0FX

I have a 6400M running Radio Firmware version v3.1.8.145. The serial number is 2019-010-4141. The 6400M does have the ATU installed. I also have a Maestro Model B serial number 2019-1746-0101-4141 running software version 3.1.8.71. They are both on the same LAN subnet which is 192.168.0.X. When I depress the Mic-Speed-PWR- TX Menu knob I do not get the TX Menu. This means I cannot select a microphone input and therefore cannot transmit SSB. I am trying to use a Heil Traveler Headset attached to Mic 2. I have confirmed bias is present and used an oscilloscope to verify microphone audio is present. I have tried falling back to the previous version of software. No Change. 

Steven WA8Y

Maybe your mode is not SSB. Different mode, different menus. Make sure you are in LSB or USB.

Valentin DL4VK

A friend of mine has the same problem with his Maestro.
Is there a known solution/reason?

Depress the TX MENU knob doesn't work/no function.

We found a workaround:
Depress the red "RF PWR" in the display will open the same menu/dialog as depressing the knob.