[Elecraft] K3 second receiver sound gone

[Dick Grolleman]

Hi All

Thsi happen to me several times now.
Been trying to work a dx staion split, and listen to to second receiver to find out where he is working the stations. I do turn off the second receiver, and turn it on again. But after doing this a few times, there is no sound anymore from the second receiver. I only can get it back by turning off the radio and switch it back on

Some on has had this problem before?

running version 2.78 still. Or should I upgrade?

K3 #1168
73 de Dick PA3FQA