Chosen Solution

rebooting screen loop keeps appearing and then disappears without turn on

Unscrew the 4 screws and remove the back cover. Disconnect the battery and leave for a few minutes. Reconnect the battery and try turning the watch on.

seems like you have a hardware issue. its probably under warranty still so contact samsung and see what they have to say bout it. hope this can help can help!

I am having the same problem with my galaxy active 2. I was wearing it while teaching and it had a 89% charge on the battery and it just all of the sudden started into the reboot loop. I’ve tried resetting it and it didn’t work because I have no connection with my phone. So it’s best to try to replace the battery then?

Leave the watch to go completely flat leave it for a couple of weeks trechargeLeave the watch to go completely flat leave it for a couple of weeks trecharge