Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
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Default Problems diagnosing TV

Kind folks,

I'm having a hard time trying to guess what's going wrong with our TV,
though, to be honest, I haven't yet cracked the sucker open because I'm
only home when the baby in the same room is trying to get to sleep. The
TV is a 20-incher less than 15 years old, bought recently used.

Problems:
-- Picture moves vertically, sometimes drifting, sometimes jumping,
generally moving downward

-- Hugging the sides of the TV at the back seem to fix that problem

-- Screen will turn to static and take sound with it; turning it off and
then on again fixes it temporarily. It's almost sudden onset -- maybe a
second or two of fuzziness, then a washout.

-- Warning sign of vertical movement seems to be increasing
fuzziness/static in display, though nothing too seriously. Black is no
longer quite so black.

-- The complete fuzzout seems to be driven by something else, like it
has to be on for an hour and then it's constant.

I thought this was a problem with the vertical hold circuitry, but the
fuzzout with sound is completely throwing me for a loop. That makes me
wonder if there's a heat/dust problem going on.

Any advice would be greatly appreciated. I'm of the mind to try a
vacuum, canned air and some electric parts cleaner, but I'd love some
direction before I electrocute myself. =)


Mike
 
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