This is at a school, the sound plays fine, the picture (from a DVD player) sits in the background behind a black box that takes up about 2/3 of the screen centered. The menu comes up with the remote, but when I try to go into the V-chip or any other setup it is locked. I am wondering how to get the black box gone. I half suspect that a student passworded the screen and I don't know how that would be reset.
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The S Video cable and the two audio cables should be plugged into the same av input on your television. It sounds like the sound cables for your cable box or satellite tv box are plugged into the television where the two audio cables for the DVD player should be.
This is an easy repair if you've ever soldered and would not be too costly for a repair shop to do it for you. The problem is a bad Vertical Output IC (usually mounted on an aluminum heat sink with the part on it labeled LA78?? ) and 1 or 2 bad capacitors. Some times you can even fix the problem by re-soldering the contacts of the IC- To find the IC follow the 4 wires that come from the Yoke (which is a contained coil of wires slipped over the neck of the picture tube(s)) back to the board. 2 of the wires go to the horizontal o/p and 2 to the Vertical o/p the thinner gauge wires are for the vertical. Be sure to vote/rate me if this helped Thanks!
This sounds like the text mode of closed caption but don't know why it would only be when playing dvd . Go into the setup menu of your dvd player and see if it has closed casption and if so turn it off. Hope this helps