[Elecraft] What do I do when "When all else fails" fails?: (boot and reload problem)

[Stephen Dubin]

 Today when I pressed the "power" button on K3; instead of the friendly startup message,  I got four blinking green lights followed by an evanescent blank orange main screen.  I invoked the "hold in "down/change" knob while pressing "power" which gave interesting but not useful results.  So,  I connected my computer with the K3 utility program and checked to be sure I had (on my computer) the latest firmware.. I then followed the directions in the help file for "What if all else fails,"  to attempt downloading of fresh firmware.  After holding in the "power" button for 10 seconds, I go the predicted flashing red "TX"  light and the "MCU LD"  on the screen. I operated the utility program (* apparently successfully)  to "send all firmware  to radio" and the green stripe progressed across my computer's screen with the following sequence of messages: Elecraft K3 Utility Revision 1.16.7.25
OS Version 10.0 Build 19044 
K3 MCU revision ??.??. RS-232 speed 38400 bit/s.
Sending firmware file C:\Users\dubin\AppData\Roaming\Elecraft\K3 Firmware\hmcu0567.hex to MCU
Waiting 6 seconds for reset to complete
Error code 0xE2000045: No response after reset
MCU verification failed. Reload MCU.
Click "Close" to close this window I did this procedure two more times with he same  outcome.\ What do I do now that "When all else fails" seems to fail? I will sincerely appreciate any help ( especially if it works) to get my beloved K3 working. .
VY 73 de W3UECSteve Dubin39.928995 N, -75.339629 W