ppk seems to have trashed my nrf52 DK - what did I do wrong?https://devzone.nordicsemi.com/f/nordic-q-a/21367/ppk-seems-to-have-trashed-my-nrf52-dk---what-did-i-do-wrongI was doing power profiling using the PPK. All was working OK, as far as I went. I disconnected the PPK, and returned to normal debugging with stand-alone DK. Now I can&#39;t get the DK to respond. Symptoms: JLink appears as a mass storage deviceen-USTelligent Community 13Tue, 18 Apr 2017 07:04:20 GMTRE: ppk seems to have trashed my nrf52 DK - what did I do wrong?https://devzone.nordicsemi.com/thread/83716?ContentTypeID=1Tue, 18 Apr 2017 07:04:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:79e528f9-6096-4ef4-a063-8a4fdb6210f0Sigurd<p>Thank you for answering your own question. No reason to apologize, if another user have the same problem you had, he can search this forum and find your answer : )</p><div style="clear:both;"></div>RE: ppk seems to have trashed my nrf52 DK - what did I do wrong?https://devzone.nordicsemi.com/thread/83715?ContentTypeID=1Thu, 13 Apr 2017 16:59:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:386d9d33-ca21-4197-b66c-4044ccc6c10dMichael Lamming<p>Doh! SB9.</p> <p><em>SB9 has to be broken for the PPK to work, and has to be restored for normal operations</em></p> <p>Sorry for creating noise on this channel.</p><div style="clear:both;"></div>