Ensure your TV is properly plugged in and receiving power. Try a different outlet if necessary.
Sometimes, the screen may be too dark. Increase the brightness level using your remote.
Ensure the correct input source is selected. If you're using an HDMI device, try a different port.
Unplug your TV, wait for a few minutes, then plug it back in. This can often resolve minor issues.
If the problem persists, consider a factory reset. Note: This will erase all your settings.