[Elecraft] Help K3 KAT3 No readout no tx carrier

[Chris Soames]

Help needed by myself a self confessed technical idiot.
Hi All I am having a problem with my K3 when I built it last December I 
did so with the KAT3 auto tuner built in.
It has worked fine for me since then until about a week ago when for 
some reason it changed its mind.
Now when I press ATU TUNE button on the front of the K3 the following 
happens ,,
  the KAT3 whirrs and clicks like it is tuning but I no longer get the 
SWR readout on the screen instead I get 2 -- marks also when I TX the 
rig TxX light illuminates red but apparently no carrier is TX'd.

I have tried several time to call colleagues that I know can usually  
hear me, I have heard them but they are no longer RX'ing me.
I have searced the manual but can find no symptom in it let alone a cure 
so guys I am open to suggestions.

Yes the KAT3 is set to Auto.
Yes it makes all the right noises.
Yes I have tried different antenna's.
Yes I have tried different Coax's.
Yes I have tried resetting the KAT3 and waiting the 5 second however 
after doing so nothing seems to happen at all
Yes I have tried both Ant 1 and Ant 2.

It just don't seem to work.

Chris
G0TZZ
In desperation.