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Having trouble to load softdevice on nRF52840-pdk

Hello,

I am using nRF52840-pdk with Keil5 and nRF-go studio for development purpose. I am facing an issue that after new firmware version upload from nRF-go studio to the nRF52840-pdk, it is not detecting in nRF-go studio as well as Keil.

When i put the board in boot-loader mode, it will prompt as boot-loader device, and after flashing bootloader J-Link OB-SAM3U128-V2-NordicSemi 160212.bin, again nRF-go studio prompt for update to new firmware. Screenshot of this prompt is attached as nrf_prompt.

image description

I have tried with J-flash also but it is showing prompt as attached in JFlash_prompt.

JFlash_prompt.png

Can you please help me to go further.

Thank you.

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