[Elecraft] K3 Receiver dead no output

[W0MU Mike Fatchett]

My secondary K3 is having troubles.

It was working fine last night.  Turned it on this am and the receiver 
is very quiet.  I have to turn the knob way up to get the same output as 
last night and there is no output.

I did a ee init reset.  No change.  reloaded all the firmware, no change.

I had this happen a couple of weeks ago and the radio mysteriously 
repaired itself.

Can anyone give me some hints on what to look for?

The radio was back at Elecraft for updates, new pins etc about 6 months 
ago (or more) and then sat in the box for months.  Took it out about a 
month ago when I set up my new shack.

W0MU