https://test-devzone.nordicsemi.com/f/nordic-q-a/89023/52840-dongleI use PCA10059 demo board,receive BT data by&quot; nrf connect for desktop&quot;,yesterday it is ok,but today when I plug it into my PC,it can&#39;t be recognized.and no any indicator, I want to know why, how to solve?en-USTelligent Community 13 Non-ProductionThu, 16 Jun 2022 08:41:03 GMThttps://test-devzone.nordicsemi.com/thread/372737?ContentTypeID=1Thu, 16 Jun 2022 08:41:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c07247d-7a68-42f8-b5c1-73ba66a17ee2user75734<p>Hi</p> <p>When you plug the Dongle into the computer, how does the LEDs act on the Dongle? You should be able to put it back into &quot;bootloader mode&quot; so that it is discoverable by the computer by pressing the side mounted button next to the white top mounted one. After pressing this button, the Dongle should show a red pulsing LED indicating it&#39;s in bootloader mode, and it should be discoverable in nRF Connect.</p> <p>You can also check out the<a href="https://test-devzone.nordicsemi.com/guides/short-range-guides/b/getting-started/posts/nrf52840-dongle-programming-tutorial"> nRF52840 Dongle programming tutorial </a>for some do&#39;s and don&#39;ts with the nRF52840 Dongle.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>