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CCS/LAUNCHXL-CC26X2R1: fail to update XDS110 firmware on LAUNCHXL-CC26X2R1

Part Number: LAUNCHXL-CC26X2R1

Tool/software: Code Composer Studio

Hi TI-Support,

I tried to download image to board via Flash Programmer 2, the tool forced to update the firmware version, but it failed at 50%.

Now the LED near TM4C129 does not light anymore. and there is no device found while I connected the board with PC via USB.

Is there any method to recover this problem? etc. force the board into download mode

C:\ti\ccs1000\ccs\ccs_base\common\uscif\xds110>xdsdfu.exe -e

USB Device Firmware Upgrade Utility
Copyright (c) 2008-2019 Texas Instruments Incorporated.  All rights reserved.

Scanning USB buses for supported XDS110 devices...


Found 0 devices.

C:\ti\ccs1000\ccs\ccs_base\common\uscif\xds110>xdsdfu.exe -e

USB Device Firmware Upgrade Utility
Copyright (c) 2008-2019 Texas Instruments Incorporated.  All rights reserved.

Scanning USB buses for supported XDS110 devices...


Found 0 devices.

thanks 

Regards,

Curtis