Locate the Mirror Mode setting within the Factory Menu (usually found under Panel Settings ). Toggle it from ON to OFF (or vice versa) and restart the television.
If this is not related to Android TV boxes, the string may occasionally appear in: Zs.z53rl.a81 Firmware REPACK
The TV will restart automatically, or the standby light will turn solid after the update is finished (usually 3–5 minutes). Troubleshooting Common Issues Locate the Mirror Mode setting within the Factory