https://devzone.nordicsemi.com/f/nordic-q-a/91035/failed-to-start-ppkDear Nordic Engineers, When I plugged in and I opened the Power Profiler App, a pop up required me to update the device firmware. During the FW upgrade the device flashed with red light and when the upgrade was completed it stopped flashing. Nowen-USTelligent Community 13Thu, 18 Aug 2022 08:51:19 GMThttps://devzone.nordicsemi.com/thread/382182?ContentTypeID=1Thu, 18 Aug 2022 08:51:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eb89132a-63ba-42b7-bd69-9a5c0c577eabTedLee<p>Hi&nbsp;<span>Simon</span></p> <p><span>I have solved the problem, download&nbsp;firmware startup failure is caused by incomplete firmware</span></p> <p><span>Thank you for your reply</span></p> <p><span>Thanks and Best regards</span></p> <p><span>TedLee</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/381928?ContentTypeID=1Wed, 17 Aug 2022 08:51:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:936bae58-9625-4991-b3e7-fd7ce2ba8a9fSimonr<p>Hi</p> <p>Can you show me a picture of your PPK where you have shorted GND to TP34 on the PPK2? That should put it back into the boorloader mode, and if you connect the &quot;Unknown&quot; board in the Power Profiler app you should get the pop-up that does says that the device needs to be programmed, and let you use the PPK2 as expected.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>