Hi Chris;
I would stop using the radio immediately!
Sounds like the main audio chip U1 on the DSP board is going out.
When they fail, you can get a HI CUR warning because they are shorting out.
They can heat to the point of destroying the DSP board (which we don't
have anymore).
Digikey LM4950TSNOPB
Keith WE6R Elecraft K3/K4 Tech
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