[Elecraft] K2 3 amps on receive

[Lennart - SM6KNL]

When I powered on my K2 today it shut down after a few seconds. The 2 
final transistors are warm but no power out. radio has been standing 
without antenna or PS connected since last time I used it. Seems like 
some bias level or driver is dead.  Last couple of times I have used the 
radio has been during tests of my new RS232 interface that worked very 
well, but that is removed now during fault finding.

Any tip on where to start looking? Serial no 6403.

Regards
Lennart