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something it either the video or horizontal circuits is defective..what you are seeing is the horizontal retrace lines...this problem can be caused by a capacitor that has become defective, or several other components...i suggest taking it to a service shop as this problem in not usually user repairable
YES THERE ARE 3 CAPS. 2 ARE SMALL ONE LARGE IN THE VERTICAL CIRCUIT. 1 OR 2.2 uF AND A 1000uF. ALL ARE VERY CLOSE TO THE VERT. IC AND YOKE PLUG. PHYSICAL EXAMINATION SHOULD SHOW WHICH ONES DRIED OUT AS THE HEAT SHRINK WRAPPING AROUND THEM PEALS UP. ALSO WHEN YOU UNSOLDER IT YOU MIGHT SMELL "STINKY FISH" AS THE ORGANIC ACID INSIDE IS LEAKING OUT THE BOTTOM. LOOK FOR BROWN OOZE ON THE LEGS ALSO.
Worth taking it in since it is hard to find a new TV for less than $300. I have a 32 inch JVC iart that for about 2 years would turn itself off and the timer light would blink. Only thing that worked would be to disconnect and turn back on. Eventually, the tv "popped" I could smell something that burned out and within 3 weeks tv went "dead" Took it to a tv repair place and replaced power unit for $150. I had similar problem with a 19 inch Philips and that tv has been going strong for 4 years since repair.
It sounds like a vertical deflection problem. You mentioned you had a white HORIZONTAL LINE in the middle of the screen. If this line runs from left to right across the screen it's in Verticla deflection. If it runs from top to bottom, it's in Horizontal deflection. I am assuming the problem is a Vertical deflaecion problem. The repairs necessary are most likley to replace the vertical capacitors or the verticla deflection chip.
NC Electronic Mills, Wyo USA
1.Are these lines only in the upper 1/3 rd portion of the screen?And is there a clear demarcation between this area and the lower portionb, where the image is perfect?
2.Or is thin Horizontal lines evenly spaced around an centimetre apart?
If it is the first case, then there si a problem with your TVs SMPS. It is not generating the required regulated 110V required for the TVs functioning.
If it is case 2, then there is a simple adjustment at the back - 'SCREEN'. This adjusts the Screen Grid Voltage, and by slightly lowering it, this problem will go away.