[Elecraft] KAT3 Auto Tuner issue

[Mike Fatchett W0MU]

I have my kit built but it does not seem to see the KAT3.  I have tried the
byp and auto setting in config.  When I push the ATU button is says not
installed.

I can hear relays switch in and out when I cycle through the test settings
in config.

I rechecked and the board appears to be plugged into the connector properly.
I am not sure how one could remove it easily without taking the back cover
off.

I have not updated the firmware and was about to install the 100w KPA unit.

Any suggestions?