https://devzone.nordicsemi.com/f/nordic-q-a/117433/issue-of-j-linkHi Support Team We meet an issue like the screenshot below when I program nRF52840 chip via the SES. The SES version is v5.42a. The J-link we used to program is on the nRF52DK(v3.0.0) and the VDD pin and VTG pin are shorted before programmingen-USTelligent Community 13Thu, 19 Dec 2024 10:31:45 GMThttps://devzone.nordicsemi.com/thread/515683?ContentTypeID=1Thu, 19 Dec 2024 10:31:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:35cb9fff-06eb-47f1-bc58-a0b609d1a3dfH&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>When using a DK to program an external board, it is important that you power the external board with the same voltage as the DK, in this case; 3V.</p> <p>Q1: Could you verify that your board is running with 3V?</p> <p>Q2: Can you also check what nrfjprog reports? for instance: &quot;nrfjprog --recover -f nrf52 --log&quot; and then share the .log file?</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>