[Elecraft] Err AT3

[Gary Smith]

Curious little bugger; since yesterday 
when I turned the K3 on and got a message 
on start-up saying ERR AT3, I find this 
happens all of the time now. 

In this error message state I can not 
transmit. What it takes to resolve this is 
to tap on a function switch like band 
change, mode, split Ect. and it 
immediately resolves to a perfectly 
working K3. It was recently back home for 
all upgrades/updates and has been working 
flawlessly, till this condition.

Any suggestions on what I might do to 
resolve this before it mutates into 
something less easy to resolve?

Thanks & 73,

Gary
KA1J