nRF52-DF Board does not appear on device manager after mistakenly formating it's bootloader in windows

[Ahmed Nabih]

I mistakenly formatted the Bootloader Partition of the nRF52-DF in the bootloader mode of the DK

After that, the DK does not appear on the device manager and does not enter bootloader mode anymore

any help on how to fix it?

[Amanda Hsieh]

Hi, 

Please try/confirm and reply regarding to this post. 

Best regards,
Amanda

[Ahmed Nabih]

I have tried all trials on this post and all does not work, the Dk does not show up on device manager at all as if it is not connected

[Ahmed Nabih]

I think I have corrupted the Interface MCU for the DK, is there is any solution to upload a new firmware to it using jtag or swo?

[Ahmed Nabih]

I Opened the DK Schematic, I have nRF52-DK 2.1.0 2021.20, I found That there is a JTAG interface to program the interface MCU, I will solder a header to it and I have openocd board to flash bin files.

I need a bin file to flash the interface MCU, is that possible?

[Amanda Hsieh]

Hi, 

It doens't need to solder to flash the interface MCU. 

Try to press the IF BOOT/RESET button while power cycling the kit. It should then show up as a Removable Storage Device named "BOOTLOADER". Then you can drag-and-drop the J-LINK interface MCU firmware found here (v170724) onto the storage device to reprogram the JLINK firmware.

-Amanda H.