We have a Mitsubishi VS-5043 that has just started exhibiting an
annoying tic. After the TV has been on for a few minutes, the screen
appears to snap down at both edges for a second and then returns to
When it does this, for a flash, you can see the individual projection
colors when the screen is distorted.
Anyone have an idea of what might cause this? Second question - are
there still TV repair guys that make house calls? This sucker's too
big to through in the trunk and take to the shop.
Yea, you are getting a HV spark. You don't want that to continue or it
will be costly. You may be able to use some compressed air to blow out the
accumulated dust out of the unit. If you can see or determine by ear
exactly where it is coming from that would help. Often it is the
accumulated dust causing the problem.
NOTICE, there is some mighty high voltage in there, it may well be there
when the set is turned or or even unplugged. It can remain lethal for days
when unplugged. Unless you know what you are doing, it is not a good idea
to mess in the guts of one of those.
It is also possible for you to damage some sensitive parts with
Coincidentally just Friday I got a 20 inch tv that had been thrown
away, and after it dried out, I plugged it and heard a big spark. Not
only that, the light shining through the slots in the top of hte tv
illuminated the wall behind it with a blue-white light. I wanted to
unplug it but I took the extra second to get to my knees and look
inside the slots to note the location.
ABsolutely. Unplugged and for days.
But I did see the location and remember it fairly well. The spark was
almost an inch long, and thick (way thicker than the spark of touching
a doorknob), and it too was blue-white. When I took the back off, the
high voltage transformer was right there, and some wires were lying on
top of part of it. I lifted them off with a chopstick -- there was
a little soot, or at least black parts, on the bottom side of them.
There was NO sign on the transformer or wire that there had been
arcing -- and used the plastic circular tie that was already there,
undid it and redid it around adjacent wires. Then I thought maybe the
HV wire was too close to something so I used a tool to bend it a bit
and got it another half inch away.
When I turned it on again, spark gone.
Other times I've used GE silicone cement, which I believe has a high
dielectric coeffficient (or whatever the term is) to add more
insulation to a weak location, maybe where the wire goes into the HV
transformer, and in one case when insulation was cracking on a
microwave oven, near the diodes.
But of course the more you run it with it sparking, the more chance of
ruining the HV, aiui.
I don't know how the projection tv's are set up and how much chance
you have of finding the spark easily.
Remove NOPSAM to email me. Please let
me know if you have posted also.
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