I have a Mitsubishi VS-5077 that I purchased in July of 1997. It has worked fine until about a month ago. Suddenly the picture disappeared for a few minutes and then returned. Over the month the picture disappeared more often and stayed off longer. Now the picture stays on only for a few minutes and then disappeard for hours. While the picture is gone there is a fuzzy blue horizintal line in the middle of the screen. The sound continues to work even when the picture is lost. What is the most probable cause of this problem?
I would just replace the TV, the parts are not going to be made to repair this. The set is just to old.
SOURCE: Black box in the middle of the screen
To be exact it is in the TEXT mode within the Closed Caption menus.
SOURCE: Mitsubishi VS 4543, Picture go out after a few minutes
I usually find that symptom you describe is caused by cracked solder joints on the power regulators or vertical output IC. I have also seen that symptom caused by loose solder joints on the vertical windings up inside one of the yokes. If you have experience in repairing TV's then you can disassemble the set and pull the main chassis, flip it over and resolder all of the parts mounted on heat sinks. If you do not have experience in repairing projection TV's then allow a qualified tech to handle it for you.
SOURCE: Mitsubishi VS-55707 Shuts Down
I would not recommend working on a TV unless you have a great deal of knowledge about them.
it is probably your power relays do you have a part # i could help you look around
SOURCE: Our Mitsubishi TV is flashing a blue screen every 10-15 seconds?
Two questions for you.
1. What is the model of the set?
2. What sources are you trying to watch? Are you on cable, satelite, dvd player, vcr,
which of these are you watching and does the problem occur on all sources or just
certain ones?
Not having the above information, I will give you some information. Blue screen comes up
on these sets because of a loss of video signal. First thing you should do is to check your
cables between your sources to see if a wire has pulled partway or now completely out
say between satelite receiver and set. You might replace the cables in case you have
a broken wire inside the cable.
Some sets have the ability to go into the menu and shut off blue screen so you can
then see what the video looks like even if it is low level. From there you can do some
diagnostics by wiggling or connecting/ disconnecting the cables.
Beyond this there could be a loose connection internal to the set or a part failing, but
be sure to check for those cable connections first as that is the most likely cause. Also
it is good to try it with another video source or test the source on another set to be sure
that the video source hasn't developed a malfunction.
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