Question about Mitsubishi VS-5077/78 TV

1 Answer

TV works fine for a while, then the picture disappears.

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?

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  • Mitsubishi Master
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I would just replace the TV, the parts are not going to be made to repair this. The set is just to old.

Posted on May 12, 2017

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Posted on Jan 02, 2017

tvtek
  • 1284 Answers

SOURCE: Black box in the middle of the screen

To be exact it is in the TEXT mode within the Closed Caption menus.

Posted on Feb 18, 2007

MikeNJ1964
  • 398 Answers

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.

Posted on Aug 05, 2007

josh1856
  • 105 Answers

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

Posted on Jan 26, 2008

  • 1153 Answers

SOURCE: Front freznel lens cracked

vancebaldwin.com

Posted on Mar 26, 2008

  • 9 Answers

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.

Posted on Feb 21, 2009

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1 Answer

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The most common issue here in the old sets is bad solder connections--the problem is you have to get the entire chassis free and up so bottom of boards face rear of set---look to power supply---a lot of 2 and 3 lead parts there from heat come loose from the boards and also to the middle of the set on the middle board.


If you are not able to attempt this the set is too old for a shop repair in my view as many parts for it are no longer available.

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You definitely have bad solder grounds. I have repaired a few of these. You will need a TV tech pull the boards out and resolder them. The worst board would be the one on the left [signal board, has rca jacks. rf connector]. And they may as well solder the second board. You will have a restored TV when completed. Thanks for asking and show a few hands of support!

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