[Elecraft] K2 trouble on the tracks

[richard gilley]

My K2 was operating fine, has the SSB module the latest addition, and  
The KTA100 addition.  Has been working fine for a week since the SSB  
addition. Was on 80 meters tuning up on low power, 3 watts, and the  
lights went out.
Removed the KTA100 and SSB board on QRP with power to min, press  
start: lights for 2 to 3 sec and quits.

Where is the best place to start?

Appreciate your help.
Best regards
Dick AD1G