There are a variety of reasons your TV doesn't display a picture or receive a signal. The most common reasons are listed below:
- Your TV may not display a picture if the indicator LED is blinking.
- Refer to this article if the TV doesn't display a picture and the LED is blinking.
- If the LED isn't blinking, continue to the next step.
- An Audio/Video source device may not be connected properly:
- Rescan the active channels if your TV is using direct cable or an over-the-air antenna.
- During the TV service initial setup step, select the built-in tuner.
- Skip this step if you are using a cable box or satellite receiver.
- Make sure your TV input is set to a connected device. Refer to the following:
- If you are using a satellite receiver, or other set-top box, your TV must be set to the base channel, which is Channel 3 or 4. After your TV displays a signal, use the remote control of the connected device to change the programs.
- The connected device may be turned off or in standby mode. Turn the device on.
- The selected channel may not be live or the media playing may be blank. Change the channel or try a different input device or movie.
- The received signal may be weak.
- If your TV uses an over-the-air antenna, you may need to adjust the antenna to improve the signal quality.
- If your TV uses a cable or satellite box, you may need to contact your service provider for further assistance in improving the signal strength.
- An optional distribution amplifier may help improve a weak signal. Visit your local electronics retailer for more information or to purchase a distribution amplifier.
The steps above should resolve the issue. If the problems persist, repair may be required.  Go to Product Repair.