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No Picture On Screen

How would I replace the capacitor in the vertical circuit. The white lines on top of the screen graduated to a completely black screen with one thin, bright, white line across the middle of the screen.

Thank you in advance.

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Change the 33uf 35v at the vertical filter

Thans!

Posted on Mar 10, 2009

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1 Answer

White lines across tv screen


Without seeing the lines I can't be sure what your set has wrong, but here are a some possibilities:

If the lines are lines are confined to the top inch or two of the screen and the picture looks otherwise normal, the trouble is bad capacitors in the vertical output circuit. Fixable by replacing the bad parts.

If diagonal lines are across the entire face of the picture tube and the picture looks washed out, the trouble is often a bad capacitor on the 200-volt line to the picture tube. This may be on the main circuit board near the horizontal output transformer, or on the small circuit board plugged onto the end of the picture tube. Again, replacing the bad capacitor can fix this.

If your TV is actually an RCA, someone may have bumped a rear-panel adjustment. On the back of the TV near the bottom right are two small knobs. RCA left these adjustments exposed inside of putting them inside the set like other manufacturers. These sometimes get bumped if someone was behind the set cleaning, or if a pet got back there and hit them with a tail. The top knob adjusts focus, and the bottom knob adjusts something called G2 or screen voltage. If this gets turned up too high it can cause the faded picture and diagonal white lines. Turn the adjustment down until a black screen looks black instead of gray.

A bad picture tube or horizontal output transformer can also cause lines through the picture. If this is the case with your set, it's time for a new TV. The transformer is relatively inexpensive but labor costs aren't, and the repair bill may exceed $200. If the tube is bad, there's no point even considering repair. The tube cost alone exceeds the cost of new TV.

Hopefully your lines are easy and cheap to fix. Good luck, and thanks for using Fixya!

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At the top of the tv screen about three inches wide there is a black line that covers the picture at the top of the screen


I, thats a vertical circuit problem with some capacitore ,they are leak or dry
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regrads Alan

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I have thin white lines that run across the top of my picture. They are only visible when picture is full screen. The wide screen picture (with the black areas at the top and bottom) do not show this. The...


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White lines on screen


im sorry my friend I do not understand what a funny marrior is? LOL If your complaining about white lines at only the top of the picture, then I would say that your problem is with the vertical sweep circuit. Most likly a capacitor in the vertical preamp really small ones next to the jungle IC or the capacitors that are used as waveshapers in the vertical drive and output. If the entire screen is white lines then the screen drive is too high so back it down till the lines just disapear. if that wont turn down, theres a filter cap on the sweeop supply or the CRT socket board is bad. Good Luck

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