"amcwill417" wrote in message
...

"amcwill417" wrote in message
...
Sony CRT TV. Audio OK. If the set is turned on all is normal for a
minute
or so. Then the picture is gone and screen fills with uniform
illumination
plus about 20 or so fine horizontal lines slightly tilted up on the
right.
After a few more seconds the screen gradually gets very bright white
and,
wham, the set clicks off by itself. If I turn the set on again it
repeats.
Anyone have a clue as to what is wrong?

Alex


11/5/2005
Thank you all for your replies which I will certainly take into
consideration when I attempt to do repairs. This will be the third time I
have had to repair this TV. The first time (about 10 years ago) the set
behaved erratically when subject to vibration. After much poking around
(with a long plastic rod) I found out that some components on the circuit
boards were loose. Amost all of the small voltage regulators (about half
the size of small postage stamps) were loose so I resoldered all I could
find and that fixed it. The second time I could not locate the problem
but
resoldered all the solder joints (which looked very good) on the HV
transformer board and by pure luck that fixed it. This third time may be
more challenging! I will keep you informed but it will take some time -
maybe a few weeks because of other duties.

Alex

A HAPPY EVENT!
This Saturday evening I opened up the TV and removed one of the circuit
boards for inspection and resoldered some suspicious looking solder joints.
Then I replaced it and turned on the set and nothing changed - set still did
not work. Then I turned on the TV and pushed down on the HV transformer
with a long stick so as to distort the circuit board it is on and WHALA that
did the trick. The set now works fine!!! I guess I will have to resolder
components on this board sometime soon since I suppose there must be a loose
solder joint somewhere. I do not understand why this Sony TV has had so
many defective solder joints. It is a wonder that it has worked at all over
these many years.

Alex