Question:

How to troubleshoot audio sync issues on a TV connected to an SD cable or satellite box?

Answer:

Determine if the audio is leading or following the picture.

Test different channels to check if the audio is in sync on other channels.

If the audio is in sync on other channels, there might be a broadcasting issue with the original channel or program.

If the audio is not in sync on other channels, test low range and high range channels.

If the audio is out of sync on all other channels, there could be an equipment or cabling problem.

Cable subscribers should proceed to Step 2, while satellite subscribers should skip to Step 3.

Disconnect the incoming cable line from the cable box and connect it directly to the TV.

Run an Auto program on the TV to memorize channels. Click here for instructions.

After the TV has memorized channels, test several channels to check for audio sync issues.

If there's no audio sync issue, the cable box or cables may be defective; try replacing them.

If the issue persists, there could be an issue with the broadcast signal or the TV. Proceed to Step 4.

Connect a secondary device (e.g., DVD player, game console) to the input connection used for the set top or satellite box.

Play something on the secondary device and check for audio sync issues.

If the audio is in sync, replace the cables and/or box. If the issue continues, contact your service provider.

If the audio is out of sync on the secondary device, the TV requires service. Create an online service request to begin the process.

Terms:

Leading - Hearing the audio before the lips move

Following - Lips moving before hearing the audio

Broadcasting issue - Problem with the way a channel or program is being transmitted

Equipment or cabling problem - Issue with the devices or connections related to your setup

Defective - Not working properly due to damage or malfunction