My Fenix 5 has this screen issue because static electricity. Happened two months ago folding clothes out of the dryer and yesterday again with some heavy blanket. Soft reset and hard reset
Amazon.com: Garmin Fenix 5 - Slate Gray with Black Band (Renewed) : Electronics
Garmin Fenix 5 Sapphire Review | Running Shoes Guru
Screen issue on my Garmin Fenix 5 - fēnix 5 series - Wearables - Garmin Forums