Can the diagnostic code be updated use 19200 baud internal clock.
57600 baud external and check if it is receiving a good timing signal from the oscillator.
Current diagnostic reports all normal at 19200.
I think I have a bad oscillator but no way to tell short of desoldering and swapping the part.
19200 code will work but no response at 57600.
The can feels slightly warm to the touch.
My other working board seems cool when running.
You can tell when I am working on stuff because I never run out of problems.