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Cyber
Question:
How
can I troubleshoot my TV's audio sync issues when connected to an SD cable or
satellite box?
Answer:
To
troubleshoot if your TV is connected to an SD cable or satellite box, follow
these steps:
- Determine
if the audio is leading or following the picture. Leading means that you hear
the audio before the lips move. Following means the lips move before you hear
the audio.
- Try
different channels.
- If the audio is in sync on other channels, then there could
be a broadcasting issue with the original channel or program.
- If the audio is
not in sync on the other channels, test additional higher and low range channels.
- If the audio is out of sync on all other channels, then there could be an equipment
or cabling problem.
If your audio is leading, go to Step 3. If the audio is
following, go to Step 4.
- If
the audio is leading the picture, consult the user manual of your home theater
or stereo to find out how to change the millisecond delay time and correct the
audio sync. If you cannot correct the audio sync using this feature, go to Step
4.
- Test
the audio from your TV speakers.
- If the audio is in sync when you play it through
the TV speakers, the broadcast signal is good and there is either a delay from
the set top box to the home theater or a delay in processing the incoming signal.
If you are not using the digital audio out on your set top box, try connecting
this output to the digital audio input on your home theater or stereo system.
Digital audio transfers the audio signal faster than analog and may eliminate
your audio sync issue.
- The
sync issue could also be caused by faulty wiring or an overly long audio cable
run: For example, if you have an audio connection run from the set top box to
the home theater of 20 feet and a video connection run of only 3 feet. Try moving
equipment closer together or using shorter audio cables. If you can’t decrease
the length of the run, try wire with low loss and quick response designed for
long runs.
- If
you are using the audio out ports on the TV and there is still an audio sync
issue after you’ve followed the steps above, your TV needs service. Please
click the “Create Online Service Request” button at the bottom of this article
to begin the service process.
Terms:
SD
- Standard Definition
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