nRF52840 power on led(Led 5) blinking continuously

[pankti583]

Hello,

nRF52840 led 5 blinks continuously causing reset and not performing code properly. I tried different USB cables but it still blinks. What could be the reason, is it only causing reset? and what can be done to make it proper?

Thank you

Pankti

[Amanda Hsieh]

Hi Pankti,

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.

Please let me know this can help or not. Thanks. 

-Amanda H.

[Michael111]

This worked for me. thanks.