[SOLVED] SIM7600 USB is dead after firmware update

[Axent1987]

Hello. I'm using SIM7600 module mounted in board from 'Thebackshed':
http://www.thebackshed.com/forum/up..._122343_BK-SIM7600_Board_user_manual_V1.0.pdf

The board worked fine. After inserting USB cable, Windows detected new device with needed drivers that I installed before.
After I tried to update my system core with SIMCOM SDK (Open Linux) (kernel , bootloader and etc). I used ADB interface and 'fastboot' tool.
All completed OK. After all step my SIM7600 continued works well. USB device detected in system after update. But ADB interface was switched off by default.

I tried to switch ADB again on my new firmware with command:
‘AT+CUSBADB=1’
SIM7600 returned OK.

Then I run:
'AT+CRESET' for module resetting.
After this step module gone in 'brick' mode. No USB detection, no any communication through UART.
But... It does something. Because I see, that NETLIGHT led blinks as the device works properly.
But I cannot communicate with module.

What can I do for repair this? Or no any chance and this is completely dead??

Thanks

 

[Axent1987]

Hello. The module was repaired through QDL utility
Thanks.