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Make a fist with ur hand and bang on the tv bazel frame.The tv picture flickers back or bounces back to a normal picture.The tv have a vertical or a horizontal hold ics have coldsoldering joints and requiring resoldering.If u bang on the tv bazel frame picture don't flickers back or bounces back to a normal picture.The tv have a vertical or a horizontal hold ics are dead require changes those ics chips.If u don't have all the tools.Can't do a basic soldering work or able to changes those ics chips.Shop around for tv shops for estamate and repairing prices for repairing.
Your Vertical Amp is probably Blown (bad) , but before you change that check all capacitors around the vertical amp IC and / or resolder resistors and diodes around vertical amplifier.
And NO it is NOT the Picture Tube
These are called vertical retrace lines. They are going to get worse untill you find the bad capacitor(s) or replace the vertical driver/output IC. Please, if you have not the solid state repair experience, get a pro to assist you in this repair as there are no user replaceable parts inside this set. Good Luck
PLease do not forget to rate this thread.
It sounds as you desribe, the vertical output IC and or the b+ feed capacitor off the Hi voltage transformer feeding the vert. IC its required voltage. Not a really hard job to replace, but not for a handi person to do. This should be left to the professional, as there are no user serviceable parts inside this set and with the HI voltage and the safety issues its best to call somesone to assist you with this repair. Good Luck
sounds like you have a vertical sweep problem. Where the fault lies cpuld be the vertical output IC the verticle b+ feed, could be the capacitors in the vertical circuit?? Your gonna need to troubleshoot thr vrtical circuit if your not a tech thin my advise is to take the set to a pro for sn est. Good Luck