https://devzone.nordicsemi.com/f/nordic-q-a/79215/upgraded-with-wrong-firmwareGood day Please assist, I had my power profiler (PPK II)and Bluetooth dongle both plugged into my laptop. I accidentally upgraded the firmware for power profiler (PPK II) with the firmware for Bluetooth dongle and updated firmware for Bluetooth dongleen-USTelligent Community 13Thu, 02 Sep 2021 11:47:57 GMThttps://devzone.nordicsemi.com/thread/327780?ContentTypeID=1Thu, 02 Sep 2021 11:47:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e303f60-dbe8-4bde-818d-ce3425d30f7eGoodwill<p>Thank you @<span>H&aring;kon, Sorted.</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/327767?ContentTypeID=1Thu, 02 Sep 2021 11:18:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:007b927e-6379-4f99-85a6-50906fd1518fhelsing<p>Good day Goodwill,</p> <p>The following method worked in a <a href="https://devzone.nordicsemi.com/f/nordic-q-a/70266/ppk2-suddenly-stopped-working">similar case</a>:</p> <blockquote> <p>&quot;Disconnect all other nordic devices from the computer, turn off the kit and remove it from the plastic by removing the four screws. Insert USB to J2 (USB DATA/POWER). Short a connection between GND (e.g on the four pin power output header) to TP34 on the PPK2. While holding the jumper cable, turn the kit on and remove the jumper. Now the PPK2 should be in bootloader again.</p> <p>Open the PPK app, and select the device which is now just a serial number, e.g&nbsp;<span>&nbsp;<img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/6153.pastedimage1610364947735v3.png" /></span><span></span></p> <p>When selecting it, the user will be prompted to program the application and it should now be working again. &quot;</p> </blockquote> <p>Please let me know if you run into any difficulties.</p> <p>Best regards,&nbsp;</p> <p>Håkon</p> <blockquote></blockquote><div style="clear:both;"></div>