Phillips Magnavox top half of screen goes black

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Old 08-14-07, 10:47 AM
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Phillips Magnavox top half of screen goes black

Phillips Magnavox top half of screen goes black after about an hour being on.
It use to correct itself if turned off and then back on. now it takes a few minutes to even hours of being off before it is full screen again.
I've read it is the vertical drive circuit. is this something I can order and replace myself?
 
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Old 08-19-07, 08:14 PM
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I took it to a repair man. He said he had to re-solder the circuit. the old solder had gotten hot and bubbled and deteriated. and when the circuit got warm the deteriated solder would not conduct electicity like it should.
 
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Old 08-20-07, 02:25 PM
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Sorry I did not respond, for some reason, I didnt ever see this post.

Yes, typical failures are from solder joints. When manufacturering these components, some factories have poor quality control and the solder joints are very poor.

Glad it's fixed, hopefully it didn't cost you an arm and a leg.
 
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Old 08-31-07, 12:53 PM
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He charged $97, he said he had a lot of time involved in resoldering the coroded and deteriated solder.
 
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Old 09-01-07, 04:21 AM
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I also missed the original post. Was it moved here from another forum?

In any case, $97 isn't so bad. Cold solder joints don't usually happen to just one area of a board. The repair tech probably touched up quite a few more as a preventive measure.
 
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