Screen went black after I took it off, have only had this device for less than a month.
Since the watch is relatively new, I'd reach out directly with Garmin Product Support.
https://forums.garmin.com/sports-fitness/healthandwellness/f/vivoactive-5-series/354507/screen-turned-black-not-responsive---but-still-functioning
+ I had the same issue like others; this is what I did and solved it... you may not like it!
AOD : OFF (was already off before)GESTURE : OFFAUTO-LOCK : OFF
A mi me pasa continuamente pero al rato se enciende solo
