[Elecraft] KX3 has died

[Dave Sublette]

I believe my KX3 has died in the past 30 minutes.  It was operating with
N1MM prior to that.

I went to the support page at Elecraft.com.

I downloaded the latest KX3 Utility.

I started the Firmware upgrade process.

Initially the message said my KX3 was missing some files and to download
the latest firmware.  I did that without any trouble.

When I went to transfer the firmware to the KX3, I got a message that said
"KX3 failed to enter firmware load mode" (or something like that).  Further
instructions said to remove power, power back up and try again.

Same result.

Tried the "force firmware upgrade"  by holding the Band- and ATU Tune
buttons down for 10 seconds.  The firmware load failed again -- same error
"KX3 failed to enter Firmware load mode".

Meanwhile the front panel of the KX3 showed " MCU LD" during the entire
time.

The com port tested good, using the KX3 utility.

I don't know what else to try.

Looks like the next step is to contact Elecraft support.

Any thoughts?

Dave, K4TO

ps -- I think the KX3 is just pouting because I have ordered a new K3s  :-)