Portenta problem after bootloader update

[wapel]

Hello.
I need some help with my new Portenta H7.
Classic IDE 1.8.13 on Linux.
I followed the tutorials. First I startet with the "Blink" Tutorial.
https://www.arduino.cc/pro/tutorials/portenta-h7/por-ard-gs
Works perfect. Upload -> Blink

After that I startet with the tutorial "Blob Detection".
https://www.arduino.cc/pro/tutorials/portenta-h7/por-openmv-bt

There is a task to Update the bootloader:
https://www.arduino.cc/pro/tutorials/portenta-h7/por-ard-bl

I followed the update instructions and used the Example Sketch "PortentaH7_updatebootloader".
The serial output said Current Version = 15, Available Version = 21.
I confirmed with "Y" and the update runs until the end with a success message. " Bootloader Update complete.You may now disconnect the board."
I disconnected the USB Port.

And now the H7 is dead.
If I connect the USB again, only the charging LED in on . I don' get a seral port anymore on the Linux OS.
"lsusb" shows no device with vendor 2341.

Has somebody an idea how I can get a connection or reflash the bootloader?

Best regards.
Marc

[nachoherrera]

Hello Wapel,

Thank you for sharing your issue with the Arduino community.

You can try to double tap the reset button on the Portenta to set the board in bootloader mode.

If this doesn't fix the port issue please feel free to contact our Technical Support team directly:
https://www.arduino.cc/en/contact-us/

[wapel]

Hi.

Yes, I tried to double tap the reset button, but nothing changed.

Thank you.

I write to the Technical Support.

[lorenko]

Hi, please let me know if you solved your problem

thanks

[lorenko]

Hi,
Have you solved your problem? If so, how?

Thank you