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 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.

[Ahmed Nabih]

Hi,

I tried it and nothing appears in the file explorer

[Amanda Hsieh]

Hi, 

Take a look at this post. 

Please make sure you are using a USB cable with data lines (some cables are made for charging only, and will not work correctly). Does the board work with another computer? Is LED 5 blinking, and at what rate?

-Amanda H.

[Ahmed Nabih]

nothing is blinking, the device is not showing in the device manager, I did all that before

[Amanda Hsieh]

Hi, 

My colleagues compiled the bootloader some years ago in this post: https://devzone.nordicsemi.com/f/nordic-q-a/60180/how-to-reset-jlink-firmware/244906 that you can try to flash to the interface MCU.

-Amanda H.