[Elecraft] KX3 ATU Not Tuning

[Aaron]

I have a KX3 with the ATU installed. I replaced the batteries and since
then the ATU will not tune.  When I hit the ATU TUNE button it just says
25.4-1 and I can hear the relays going off. I opened it back up and looked
for any cables not connected or anything and it looked all fine to me but I
could have missed something.  It was working just fine before the battery
switch.