CRITICAL - Telit ME910C1-WW firmware upgrade fail!

Good morning,

I have tried to issue a FW upgrade yesterday, however, after around one minute, the upgrade failed. Now the board serial ports are no more accessible, including the diagnostic one. Beside that, when holding on/off button for 5 seconds or more as previously I was doing, the board doesn’t turn on. I am using BRAVO evaluation kit.

How can I fix this critical issue?

Thanks in advance.