Try doing a reset on the tv. Follow the instructions below
POWER CYCLE RESET:
Unplug the power cord and wait 10-15 minutes (extremely important, I used a timer set for 16 minutes just to be sure).
While it is still unplugged, press and hold the [POWER] button for at LEAST 30 SECONDS - DO NOT RELEASE!
While continuing to hold the [POWER] button, plug the TV back in. Btw, I’m available to help over the phone in case u need at
https://www.6ya.com/expert/vincent_456bdeb17f8dd0de