[Elecraft] Help Please - Possible Static Damage to K3 low power PA

[john petters]

Can anyone advise please? I have just been on 17M ssb running 10 watts 
with the K3 No high power PA installed. I heard a ticking noise coming 
from the ATU. Switched off and disconnected the 450 feeder to the quad 
and got quite a large spark to the case of the ATU. The heavens then 
opened, although there was no sign of any thunder or lightning.

The K3 will now only put out a maximum of 5 to six watts on all bands. 
Before I order some new PA FETs has anyone got any other suggestions?
73
John G3YPZ