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darksofter

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Dear Team,

I was able to get a Sony CRT with component and 480i only. When I first turned it on, I had only a black screen. There was this high frequency noise, so I knew the CRT was alive. I opened the TV and adjusted the flyback regulator a little. I turned the TV on and alas a picture. So I put the TV back together. And screen goes black again. I open it up again and turn on the tv. Picture is back. To test this finding, I put the back cover on and turn the tv on and I have a black screen. While having the tv on I pull the cover back and the picture shows up. When I put the cover back on while playing a console, I can proceed normally. However when I start the tv again, the screen goes black.

I am trying to find out what causes the black screen. There must be something lose.
 
Look for cold solder on all of the components that are mounted to heat sinks.
 
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