If the TV cannot find an update online or has no internet access, you may need to use a USB drive. Visit the official Nikai Support page
Press the Home button on your remote and navigate to the Settings (gear icon). Nikai Tv Software Update
Is your TV running on or a different operating system? If the TV cannot find an update online
However, general steps for updating TV software (if your device is Android-based or a smart TV) are: Nikai Tv Software Update