If your model is older, official support might have ceased. In this case, you may need to look for customized firmware from reputable forums. When to Contact Support
Updates rewrite system files, but residual data from the old software can sometimes conflict with the new system. Navigating to Settings > Storage & Reset > Factory Data Reset wipes clean any conflicting code and gives you a true "fresh start" performance boost. Nikai Tv Software Update
Are you experiencing any specific currently? If your model is older, official support might have ceased
Turn on to allow the TV to update itself in the future, or click Check for Update to run a manual scan. If your model is older
Turn off the Nikai TV and unplug it completely from the wall outlet.