TV Started few months ago with extra ghosting hor.line on top 10% of screen. Then losses screen. Resoldered most joint, replaced LA7838 vert IC. TV back to condition before with a couple of horizontal line on top of screen. 2 days later returned to no screen with sound/ channel ok. How do I fix the root cause - the extra horizontal line appears on top section of screen? OR could it be something else? Thank you!
Try to tweak the G2 pot : you will see a fine and bright line across the screen. Turn off the set, and turn down G2 pot. You have a fault in the vertical deflection!
The fault was never repaired. ESR or jump out the vertical circuit capacitors. As the new ic has completely failed by now, you also need to replace the vertical output ic and probably a fusible resistor.
Change these caps and the IC again ( My notes show that IC is a LA7836 NOT a
7838)C451 220/16v C455 100/35v
========================== Jeff Stielau Shoreline Electronics Repair
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