Had the same problem early on. I was not happy. The procedure is called Forcing a Firmware Download. Its on page 47 of the K3s manual, and probably close by if you have a K3.
David Mackey
[hidden email]
> On Nov 16, 2016, at 23:01, Dick Dievendorff
[hidden email] [Elecraft_K3] <
[hidden email]> wrote:
>
> There is a procedure in K3 Utility Help, Trouble shooting MCU load failure.
>
> Dick, K6KR
>
> Sent from my iPhone
>
> > On Nov 16, 2016, at 19:12, David F. Reed <
[hidden email]> wrote:
> >
> > Somehow while loading rev 5.54 to my K3, it locked up.
> > It is hung up with the TX led flashing and the screen saying MCU LD.
> > What can I do to recover from this disaster?
> >
> > thanks & 73 de Dave, W5SV
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