Dongle nRF52840 has been reset and is no longer working with Green LED, how do I resolve it?

[Junior]

The Dongle was reset on the button and now the LED is off, it doesn't turn green anymore, which was the way it worked

[Johan_Ha]

Was it a program you had loaded into it, the one that blinked the green led? I guess you have to reload it. There's a reset button next to the visible button. You push it "sideways". Keep it pushed while you plug in the dongle to your computer. The red led should start flashing. Now you can upload a new program. Though the Nordic Semi guys call it downloading.