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Half a picture in black

When i turn the tv on half of the screen is black. It shows half a picture some time it will work for a month and then go back to the half black screen.

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Witch part of the screen you loose?if is the bottom or the top it could be a problem in the vertical IC circuit if is the left side or the right side is a problem on the horizontal deflection circuit(very rare),try taping on the set when it does it and see if the pix reacts ,if it does one way or the other you have loose conections and some resoldering need to be done.If you are familiar with tv circuitry you will have no problem.If you are not be safe and call for help.

Posted on Sep 19, 2006

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Posted on Jan 02, 2017

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1 Answer

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I own a Samsung LN40C630K1FXZA TV with no picture but has audio and backlights. I need help determining what boards to replace. I tried to watch some tutorials posted on YouTube and have the following information. The TV was starting to have an issue that while watching it the picture was seeming to get a little jerky like it wasn't refreshing fast enough. It wasn't always noticeable and I initially though it may have been a signal issue with our cable. Eventually we turned on the TV one morning, the picture came on and then disappeared after 2 or 3 seconds but we still had audio. I tried to pull up the menu screen and that was not visible. I performed the flashlight test and there are images visible with the light. I removed the back cover and took pictures of the attached boards and also saw that the backlights seemed to be working but did seem like they were not quite a constant consistantly light. They never completely extinguish but do seem to fluctuate in brightness slightly. I did not see any visible issues with any if the capacitors being swollen or blown and did not see any apparent burnt components or boards. Below are the readings I got from one board but I was not sure where to get the readings on the TCON board. Main PBA readings CN201 1. 18v. Actual 13.1v 2. Sw. Power Actual 13.1v 3. 18v. Actual 13.1v 4. 5v. Actual. Falling to -1.6mv 5. 5v actual. Falling to -1.7mv 6. 5v actual 5.15v 7. 5v. Actual 5.15v 8. ground actual 13.1v 9. Ground actual 13.1v Any help would be greatly appreciated so I can buy the right parts from you. Thanks, Chris

Jan 19, 2019 | Samsung Televison & Video

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