I got that once and that was the PSU running low volt. Check that for a start.
I am not sure whatever there is a replace bar battery in a K3.
73, Joe OZ0J
Fra: Elecraft-K3@groups.io <Elecraft-K3@groups.io> På vegne af Irwin Darack
I received a low battery prompt on my K3S. It flashed on for few seconds and then disappeared. In K3_EZ software I get a reading of 1N in the BAT MIN under General Config. I am not sure this is an indication that the Battery needs to be replaced. Are there any other thing besides the battery than would give me this indication.