Startup Troubles on Dev Kit

[SteveHx]

I was able one time to power up the nRF9160 dev kit and see it connect to the cellular network and to nRF Cloud. Since then, it will only blink LED3, which indicates that it can't connect. I would like to re-flash the firmware, but I'm totally lost in all the circular links in the documentation. I have used the nRF52832 dev kit extensively so I'm quite familiar with the process, but it appears the nRF9160 dev kti adds several more layers of complexity. I would like to be able to load a simple "hello world" application, and then build on that with my application source code. Please guide me to some concise documentation.

[Didrik Rokhaug]

Regarding your infinite LED 3 blinking, can you check the UART output (after updating to the newest modem firmware) in the Link Monitor or another serial terminal to see if any error message gets printed?

If you get a "cloud_connect error: -111" or something like that, something is probably wrong with the pre-provisioned certificates. In that case, you should open a private ticket listing the IMEI of your DK where you request new certificates.