Recovering nRF52840 PDK interface MCU

[Lorenzo]

Hi,

when powering up the nRF52840 PDK its interface MCU LED is blinking fast and the board is not recognized. I've tried to update its firmware by putting the board in bootloader mode and loading this firmware, but nothing is changing. The same process worked for my nRF52840 DK board. Is there any other firmware that should be used for the Preview DK?

Thank you!

[Sigurd]

Hi,

Please go through this list:

https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work

If you are still not able to get the kit to work after that, you should then buy a new nRF52840 DK. The nRF52840 Preview DK is now deprecated and not recommended for development, as the preview kits contains early engineering samples from before the chip was qualified. The engineering samples are not supported in latest SDK versions either. See this matrix.