My Garmin Fenix 5S ran out of battery overnight. When I plugged it in this morning it briefly displayed the charging icon and then the triangle, but then went dark and has not done anything since. I left it plugged in for a while, then checked the cables and the contacts and cleaned them. I have no reason to think the cable isn't working; it has been fine until now. I also tried connecting it to my computer and it didn't recognise the device either and still remained dark. Other posts have suggested holding down the light button for 30 seconds; this doesn't work. I have seen posts suggesting a master reset, but I cannot find anything to tell me how to perform a master reset if the screen is not showing anything. Any help greatly appreciated. I've tried the support centre and that is not helping at all.
