When troubleshooting your TV, the first thing to do is to check that the source of the problem is not in your home. Check all cables and connections between components, such as the cable box and the TV connector, and make sure everything is securely connected and properly configured. If the problem persists, you can try using a different cable such as an HDMI or component cable.
If the problem is with the TV itself, you can try a few different things. First, check your TV's settings to make sure they match the devices connected to it. You may need to manually adjust the audio or video settings to make sure everything works properly. It may also be worth checking for software updates and, if all else fails, resetting your TV to factory settings.
If you are still having trouble after trying these steps, you may want to consult your TV's manual or seek help from a professional repair technician. A technician can help diagnose the problem and advise you on the best action to take. In some cases, it may be worth replacing the TV if the problem is too complex or expensive to fix.