Is this the kind of picture you get on your new home
theatre display? Moving black lines through the picture and generally poor
quality images. Do you have Audio buzz coming from your speaker?
Some times these problems are caused
by the interconnection of system components like Satellite or Cable systems,
DVD players, VCR’S, Audio amplifiers and receivers. Internal grounding in
one piece of equipment or a power or grounding loop problem can cause this
type of distortion. When ground loops cause the problem we have some hints
on how to find and fix it.
How to find and eliminate ground
loops and prevent AC Hum.
For complex systems you may need to
repeat the following steps starting with a different piece of equipment in
various combinations to locate the problem and correct it. See figure 1.
#1 Strip the system down to the
display and one Video or Audio source. Disconnect any Satellite or cable
system, DVD player, VCR, Audio Receiver etc.
#2 Add one
piece of equipment back at a time. Reconnect Cables, power and check for
Humbars in the Video or Hum in the audio.
#3 Proceed until you find the
offending component(s) that is causing the problem.
#4 Once you know what combination
of components is responsible Allen Avionics Will probably have a Audio or
Video Hum Eliminator you can insert between the offending equipment and the
rest of the system to permanently stop the Hum