https://devzone.nordicsemi.com/f/nordic-q-a/51506/nrf9160-dk---led-5-blinking-when-supplied-with-powerbankHi, I have a MQTT-sample based application running and everything works fine. If I supply the DK through a USB cable connected with my computer, LED 5 blinks high frequently at the beginning (about 1 - 2 seconds) and then stays on. If I connect theen-USTelligent Community 13Wed, 28 Aug 2019 11:28:14 GMThttps://devzone.nordicsemi.com/thread/206596?ContentTypeID=1Wed, 28 Aug 2019 11:28:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e77b7aed-b402-4a49-bf6f-2b87f18689f0H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>If the LED5, near the debugger IC, is blinking; it means that it is trying to enumerate over USB. When connected to a powerbank, it will never enumerate, so it continues to blink.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>