We have just taken a TV out after having been boxed up for several months - the TV, not us. The sound is fine but the picture has reduced to a thin horizontal line approx 1 cm deep. The screen is black below this line. Above the line are thin horizontal "strands" spaced about 1-2 cm apart. To complicate matters, someone has lost the remote!
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If this is a picture tube set (not a thin screen), then you have a bad electrolytic capacitor in the vertical circuit. Just about all picture tube sets that I've worked on that get lines at the top was caused by a bad or leaky cap and is a common problem w/ most sets. There's a very slim chance it could be the vertical ic but normally when it goes bad you will have nothing but a thin white line running across the center of the screen from left to right. If it's just a capacitor, the part would only cost a couple of dollars at most, however there's no way I can tell you exactly which one to change w/ out looking in the set. A repair shop would probably get between $30-$50 to fix it. If you can give me the model number of the tv, I can see if I can you some more info.
Check if this occurs regardless what the source of the signal, whether it is DVD or cable or a playstation. You can also check if the Menu flickers as well. If the menu does not flicker along with the picture it could be a problem with the source, probably your with the cable box or the port where it goes to on your tv
sounds like you have feild colapse.take off the back and on the ciruit look for the horizontal and when you get it sue a screw driver and a mirror. put the mirror in front of the tv once you locate the horizontal plug the tv back on and look at the mirror and as soon as you turn the horizontal you will see the picture come back up to the correct size, if no good???? take it out and get a new one if you look on the side off the component you must get tthe same for safety, solder the new component in and try again
You need to check the horizontal IC for deffects, possibly and most likely there are dry joints on the legs of the Horizontal IC. Have all the legs on the IC soldered nicely, this shud sort out your problems as you say you hit the TV then works. Try this before replacing the IC
Check capicitor in vertical hold circuit. You should have solid knowledge of electronics repair before attemping repair. TV's can emmit harmful radiation, and produce voltages up to or in excess of 30kV.
yes it can still be fixed! the pop sound you've heard maybe came from a blown capacitor in the vertical deflection circuits. this symptom, sometimes called the tube light effect, it is characterised by a bright thin horizontal line across the middle of the screen. this symptom is caused by a breakdown in the vertical deflection circuit. hence maybe the trouble maybe in the vertical oscillator, amplifier or output circuits. but if all i have said is not clear to you, better bring it to a qualified tv technician. good luck!
The set should have a vertical output IC,You need to change it ,maybe you can check the B+ going to it because it might have opened the safety resistor if the IC went bad.You can check for broken board too unless the set is never move from one place.Be carefull when checking voltages ,there is still high voltage,not much but can num your whole hand.