[Elecraft] KXAT2 problem

[VE2PID]

Hi to all .. I have a problem with my KX2 which appeared today. When I 
press ATU to start a tuning sequence, I hear the familiar relays noise 
of the KXAT2. the 3 W power level is indicated, but it seems that no 
power is getting out to the antenna or dummy load. After 2 or 3 seconds, 
the sequence stops and a 25:1 SWR is indicated ... ...

Any suggestion?

Thanks de Pierre VE2PID KX2 s/n 1464