Samsung UA40D5500 E-Manual page 225

Issues
Others
Purple/green rolling horizontal
bars and buzzing noise
from the TV speakers with
Component cable connection.
Plasma TV is making humming
noise. for PDP TV
◀
Solutions and Explanations
•
Remove the left and right audio connections from the set-top-box. If the
buzzing stops, this indicates that the set-top-box has a grounding issue.
Replace the Component video cables with an HDMI connection.
•
Plasma TVs typically make a soft humming sound. This is normal. It's
caused by the electrical charges that are used to create the images on
the screen.
•
If the humming sound is loud, you may have set the brightness on the
TV too high. Try setting the brightness lower.
•
You can also have loud humming if the back of your Plasma TV is too
close to a wall or other hard surface. Also try rerouting your connection
cables.
•
Improper installation of wall mount can create excessive noise.
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