Unable to flash custom board using devkit (both nrf52840)

[Vic0]

Hi all,

I am using a tagconnect cable to flash my custom boards using a devkit. I was able to flash 4/5 boards. I first recovered the locked factory boards, and then flashed them. Unfortunately the last board keeps giving me this error:

I am doing nothing different here compared to the last 4 boards. Code remains the same. I also probed the PCB with a multimeter to check for any hardware issues but everything seems to be OK. Can someone help? (this screenshot is from NCS on vscode. I was using platform io earlier but that gave me the same error)

Thank you!

[Dave Littell]

Hi Vic0,

I once had a similar problem with an nRF52840-based board.  Ultimately the problem was the nRF52840 wasn't being powered properly.  Just a thought...  Good luck!