Apple Watch series 6 display blackout issue

Hi guys does anyone came across this display blackout issue in your Apple Watch series 6? My display seems so be blackout and I can hear my notifications and so on. But no display!! Found out few YouTube videos where they tapped the watch and at the same time they placed it in the charging! Rebooted the device but it didn’t work! I followed the instructions from the YouTube video. Trying to send Watch out to Apple store this week by mail for repair. Hope they can do it!