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The main problem is from theTV menu.I would recommend you press,menu,then settings,then display settings,and last tv screen. After, you'll get options on how you want to make your screen look like.Example:wide screen, Automatic, etc.
This trouble symptom picture wide or"blooming", the picture becomes dim even with the brightness control full on,and there is an abnormal enlargement of picture or raster.Usually,the enlargement is uniform,but there may be some defocusing.In some circuits,the brightness control operatesin reverse(rotating the control for an increase in brightness produces a decrease) after reaching a critical point on the control. If the picture wide is not accompanied by insufficient width(a symptom of horizontal output failure) the probable cause is a high volatge circuit ony,particularly the HV rectifier and HV winding.Any circuit problem that reduces but does not completely eliminate the high-voltage output to the picture tube second anode can cause overscan. The most likely defects are leaking high-voltage capacitors,defective high voltge tube rectifiers,leaking high voltage leads,defects in high voltage circuit protective resistance,and shorted turns in high voltage winding of the flyback transformer.
problem is caused by the loss of horizontal deflection signal. It is quite surprising that the entire unit is still working, since usually, a loss of H-Out will disable the entire set. Problem can be as simple as loose solder connection to a more complicated defective horizontal circuit. I would suggest havint it checked by a professional TV tech.
Sounds like it is a widescreen TV stuck in standard view mode.
Should have a menu option called widescreen or movie format.
Do you see the whole picture squeezed down or is it actually cutting off the sides of it?
you might be getting more supply from regulated power supply if you get wide pictureor width have to be adjusted by width control.
but if it stretchs out & lose some of the picture on the right and left edges it might be due to horizontal output section.
1 loose contact in connector.
2 some capacitor might be defective in h/section
please do not open the set unless you know about high voltage in tv set.