Hi there,
We appear to be having the same issue as described here and here on a nrf9160 DK. There was no clear changes to hardware at all. LED5 suddenly does not seem to go on anymore and we are not able to program the kit.
Can you kindly advise/expand in a bit more detail step 4 as described in the posts above? We are power cycling the board while pressing the reset button, but it does not show up as bootloader (where should it show up? How should the reset button be pressed?)
This post has been upvoted a lot so I am confident this can solve the issue.
