Hi Betty, Thank you for your feedback regarding lip sync issues on your Samsung U7900F TV. Audio delays can sometimes be related to the content source, but if you're noticing this issue across multiple inputs or apps, there are a few settings to try depending on your setup: If you're using external audio (e.g., a soundbar or receiver): 1. Adjust the Digital Audio Delay. You can manually sync the audio with the video: Settings > All Settings > Sound > Expert Settings > Digital Output Audio Delay 2. Enable Pass-Through Mode. This allows the audio signal to bypass additional TV processing, reducing delay: Settings > All Settings > Sound > Expert Settings > Digital Audio Output Format > Pass-Through If you're using the TV’s built-in speakers: 1. Run a Software Update. Firmware updates may improve system performance, including audio sync: Settings > Support > Software Update > Update Now 2. Cold Boot Your TV. With the TV on, hold down the power button on your remote until the TV turns off and back on. This can resolve temporary sync issues. If the problem persists after trying these steps, we’d be happy to help with additional troubleshooting or arrange service if needed. Please contact Samsung Support at 1-800-SAMSUNG (8AM – 9PM EST Mon – Fri, 8AM – 6PM Sat – Sun). You can also LiveChat with an agent or explore additional resources on our website by clicking the ‘Support’ link. ~ Samsung Advisor

Hi Nita90, Thank you for your feedback. Please note that the U79000FD TV offers built-in speakers. If you're not hearing sound or if the sound cuts out and you're using only the TV’s built-in speakers (no soundbar or external device), try the following steps: 1. Check volume and mute settings, and make sure the Sound Output is set to TV Speaker: Settings > All Settings > Sound > Sound Output > TV Speaker 2. Run a Sound Test to help diagnose the issue: Settings > Support > Device Care > Self Diagnosis > Sound Test 3. Cold boot your TV by holding the power button on the remote until the TV turns off and back on (Or unplug the TV from power for 30 seconds, then plug it back in) 4. Reset sound settings to default: Settings > All Settings > Sound > Expert Settings > Reset Sound 5. Update your TV’s software in case a firmware issue is affecting audio: Settings > Support > Software Update > Update Now If none of these steps restore your sound, please contact us for further assistance. You can reach Samsung Support at 1-800-SAMSUNG (8AM – 9PM EST Mon – Fri, 8AM – 6PM Sat – Sun). LiveChat is also available via the ‘Support’ link on our website. ~ Samsung Advisor