Hello,
I am unable to flash target board using my nrf52840 Dev board. I have two dev boards and I am able to flash the target with the other dev board.
The target board is based on mdbtv50.
I have not made any hardware changes to the Dev board. However, I am able to run any of the examples on the DK and it works fine.
I have attached the J-link commander and nrf connect log files. Please assist me with this,
2019-04-16T07:07:45.038Z INFO Application data folder: C:\Users\gauth\AppData\Roaming\nrfconnect\pc-nrfconnect-programmer
2019-04-16T07:07:45.231Z DEBUG App pc-nrfconnect-programmer v1.0.2 official
2019-04-16T07:07:45.231Z DEBUG App path: C:\Users\gauth\.nrfconnect-apps\node_modules\pc-nrfconnect-programmer
2019-04-16T07:07:45.231Z DEBUG nRFConnect 2.6.1 is supported by the app (^2.6.0)
2019-04-16T07:07:45.231Z DEBUG nRFConnect path: C:\Users\gauth\AppData\Local\Programs\nrfconnect\resources\app.asar
2019-04-16T07:07:45.231Z DEBUG HomeDir: C:\Users\gauth
2019-04-16T07:07:45.231Z DEBUG TmpDir: C:\Users\gauth\AppData\Local\Temp
2019-04-16T07:07:45.392Z INFO Using nrfjprog library 9.8.0, pc-nrfjprog-js 1.4.1
2019-04-16T07:07:50.367Z INFO Using nrfjprog to communicate with target
2019-04-16T07:07:51.843Z INFO Using J-Link Software version 6.40
2019-04-16T07:07:52.945Z INFO Segger serial: 683578621
2019-04-16T07:07:52.945Z INFO Segger speed: 2000 kHz
2019-04-16T07:07:52.945Z INFO Segger version: J-Link OB-SAM3U128-V2-NordicSemi compiled Jan 7 2019 14:07:15
2019-04-16T07:07:52.946Z INFO Probed: 683578621.
2019-04-16T07:07:52.946Z INFO Model: NRF52840_xxAA_REV1.
2019-04-16T07:07:52.946Z INFO RAM: 256KiB.
2019-04-16T07:07:52.946Z INFO Flash: 1024KiB in pages of 4KiB.
2019-04-16T07:07:54.232Z INFO Reading device non-volatile memory. This may take a few seconds.
2019-04-16T07:08:11.533Z INFO Using nrfjprog to communicate with target
2019-04-16T07:08:12.694Z INFO Using J-Link Software version 6.40
2019-04-16T07:08:13.533Z INFO Segger serial: 683578621
2019-04-16T07:08:13.533Z INFO Segger speed: 2000 kHz
2019-04-16T07:08:13.533Z INFO Segger version: J-Link OB-SAM3U128-V2-NordicSemi compiled Jan 7 2019 14:07:15
2019-04-16T07:08:13.533Z INFO Probed: 683578621.
2019-04-16T07:08:13.533Z INFO Model: NRF52840_xxAA_REV1.
2019-04-16T07:08:13.534Z INFO RAM: 256KiB.
2019-04-16T07:08:13.534Z INFO Flash: 1024KiB in pages of 4KiB.
2019-04-16T07:08:14.653Z INFO Reading device non-volatile memory. This may take a few seconds.
2019-04-16T07:08:29.462Z INFO Non-volatile memory has been read. 1 non-empty memory blocks identified.
Thank you, 
