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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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
The feature you are looking for would is called CC or Closed Captioning. Per your owners manual you would press the menu button, then move up and down to select "CLOSED CAPTION" from the list. Then to edit the feature press left or right. Select CAPTION to on. The manual lists four different types of captioning (C1-C4) and also four different types of "Text" (T1-T4). Usually one of the caption listings will display only when the mute is selected...its just not very clear which one exactly will do it.
One word of warning, you would not want to activate the Text features. This will sometimes have a large black box appear in the middle of your screen providing other information.
UnfortunatelyJVC does not have a link to your manual on their website, but the manual should be able to be found by entering JVC AV-32120 Manual in a search engine. I would check a few of the results because some maybe free others may ask for a "nominal" fee.
Since the you were vacuuming behind the set before this happened, I'm going to assume that you unplugged an input.
Check the wiring, not just on the back of the set, but, on the back of the peripherals (DVD, Satelite, cable box, etc.)
If wires are connected, then, take a component, such as a VCR or cable box and hook it up to the RF connector (AKA the cable connector) and run it on channel 3 or 4. If you have sound, then, you have a configuration problem and need to rewire your set.
Hope this helps.