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Line on t.v. no picture - Sanyo DS31590 31" TV

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Re: Line on t.v. no picture

If you are getting a horizontal line across the screen, It means the vertical amplifier IC is defective.

Posted on Jan 16, 2008

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Good picture but a squigly line

Will you please provide more details> Is the line across the screen at its middle?

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KLH television K128 have no picture but have sound

The line output section circuits must be troubleshooted. Line output transofremer, and line output transistor should be suspected. Pictures of both these parts attached.

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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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possoble cold solder connections breaking when unit is cold they expand when hot thus making connection.

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I have seen issues with complaints of raster with vertical retrace lines at the top of the picture and capacitor 2494 needs to be removed.

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Vertical size of picture

You have a number of bad capacitors in the vertical circuit. If you can solder, you should be able to repair this yourself. I'll look up your model to get the parts needed.

Jun 02, 2008 | Toshiba 36A50 36" TV

1 Answer

Green lines

Due to vertical section failure horizontal line apprears. You did not mention about picture. Green horizontal line means with picture or without picture. With picture means there is some leakage. Without picture only singe horizontal line means vertical section totally not working. Particularly green horizontal line means maybe leads to jungle ic failure. Please mention your simptom clearly what you get and what you will not get both video and audio. It will be helpful to answer. Based on your question this is my small information.

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1 Answer

Beautifull picture except for a jiggling black line in pricure

your tv is having horizontal problem take it to a tech in order that the hrizontak deflection circuit be checked it also might have abad yoke

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Tv showing blue screen with flyback lines sound ok

Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket

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