My picture all of a sudden is not fitting the screen. It appears to be about 20% to big. If there are any graphics (like sporting events, scores etc.) they usually get cut off. It appears the picture has stretched? I've played with the picture settings in the menu but that does not fix the problem. Thanks
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a green screen on power up with retrace lines. At shut down a point appears in the middle of the screen.
Sounds like either a shorted G2 grid, or bad flyback. If a phospher flake has shorted the grid in the tube, you can sometimes have luck by using a megger set at 1000VDC, to burn away the short.
This is usually caused by the line HV going too high causing the anti-UV protection to kick in so fit a dummy load 40W lamp instead to the line output to allow measurements to be made.
There is a service menu that controls such things as picture size etc. and that's likely where adjustments have to be made. Unfortunately I'm not sure how to get into it. That information should be here somewhere, search for your tv brand and "service menu".
Sounds as though you have a leaking Capacitor in the horizontal section. The problem capacitor is likey to be orage in color and rated at 2kv or higher. Located next to the High Voltage transformer ( Flyback transformer ). Be very cautious if you are changing this, or any part yourself as the picture tube can charge high voltage ( up to 35,000 volts ) for a long period of time. Always discharge the picture tube first before servicing a set.
Replace the capacitor with a like part with the same or higher voltage rating and the same capacitance number ( mfd, pfc,or such ) as listed on the side of the part.
Hi it sound like you a problem called east west correction. But you will need to take it to a repair shop to fix it. My self i charge about £30 to fix this kind of fault. But dont know what others charg All the best Bob