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Sounds like a cold solder connection on the crt driver board, in the video circuit, or could even be a poor connection in the power supply. You would have to go in a nd probe around with a plastic tool to see what section the problem occours in, then localizing the bad connection the resoldering the connection. If your not a repair person or a pro then you soulnt go inside these things as they can cause the used serious harm if your not carefull. Good Luck
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I would look for intermitent solder connections on the small horizonal driver transformer as well as other HV Componets.(HV Transformer etc.) Also solder up the Vetical output IC. These have been common causes of failures. I would not use the set until these have been checked and soldered. If you don't, a massive failure of the hoizonal circuit and powersupply will occur.
Hope this helps,
It must be connected with the color circuit of your tv, a board connected to back end of the tube. Could be dust, cob web or carbon deposit shorting a transistor. Popping noise if loud enough can be attributed to high voltage circuit fault and picture tube.
this sounds like 60hz or 120hz a/c ripple distortion. if taping tv corrects temporarily, ther must be poor solder on main a/c ripple filter. very large usually blue capacitor near power cord input on pcb. do not short positve and negative legs together as you could be shocked(even after tv is unplugged) and also cause more damage to tv. these filters can store electrical charges for days, even if unplugged the whole time. careful! mch
Sony doesn't want anyone to see a poor picture on a Sony tv so they have a circuit that blanks the video if there is a weak picture or any other problem concerning picture quality. My Sony factory Instructor told me this many many years ago. I'm feeling old...but anyway you need a technician. Sorry.
The sound you are hearing is the degausing coil which will vibrate for a second when the tv is turned on. This part demagnetizes the picture tube and this sound is really quite normal. Depending on the position of this coil it may vibrate against the front cabinet of the tv and may sound loud at times. If this really bothers you then you need to have the rear cover removed and have it repositioned a bit do it won't vibrate so loudly. Or you can enjoy the buzz for the short time it happens and not worry about it.
There's a possibility that you may be experiencing problems with the audio output IC -IC404 - All serial numbers produced until July 2003 might use one of these defective IC's. So if your set was manufactured before this date, that is probably the culprit. If not, and you have it connected to a cable box that has its own volume control, it could be that its volume is turned down and by turning up the TV's volume too high that you are getting this distortion. Hope that helps.
I have a KV-27V55 and when I turn the TV on the picture and sound is good for about 30 minutes and then the picture goes off, but the sound is still on. It will come back on after a while. What do I do?