[Elecraft] UPGRADE VERSION 3.11

[py5eg]

Hi Folks:
 
During a upgrade procedure of one of my K3 to version 3.11 a malfunction has occurred
 
1) A message asking to turn the K3 of and on again to continue the upgrade
2) I tried to turn of and didn´t succeed 
3) I turned the power supply off and turned on again,and turned the K3 on
4) The process crushed and with the display was off  with  "MCU LD"
5) The TX led blinking and no way to turn off
 
What should I do?
 
Atilano