[Elecraft] K3 Firmware load failure

[Cady, Fred]

Well I got the K3 into a weird state and can't load the firmware.
Follow directions in K3 Utility help to force firmware load and
subsequently get this message:
MCU firmware file hmcu0414.hex verified
K3 MCU Bootstrap Loader did not echo "D"
Remove K3 power and retry firmware load
Error code xE2000011, Bootstrap Loader did not echo a D
MCU firmware load failed
Click "Close" to close this window

Help!
Fred
KE7X