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How can I fix a 55in Samsung LED screen that has a faint black cloud in the corner?

I have a 55in Samsung LED that has started showing a faint black cloud in the upper right corner of the screen no matter what is showing. The screen also dims uncontrollably even in steady lighting. Software is up to date. The PIN to reset is not recognized. Picture test is fine except for the cloud.

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electro-medical.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Posted on Dec 29, 2016

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It's either the control board or the display itself.
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Samsung tv does not completely turn on


Check and replace the damaged component/s at its main board. Contact any service technician. If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
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If my Samsung 55in led tv if off all nite, it will turn on ok in the morning. if I turn off again after its on for an hour or so, it will not turn on again, until many hours off.


Main power supply regulator board fault. Check the start voltage resistors for developed high resistance value. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

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I just bought private sale 55in hisense tv,,,,,,,,,,,only displays half screen,,,,easy fix or costly fix???


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Sharp LC37D44U Power LED was flashing green. TV would turn on, channel indicator shows in upper right corner, sound good, but screen would be black. Channel indicator disappears but screen is still...


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The TV has a Black cloud on the right half of the


My parents have the same issue with their Sony KDL-46V4100 TV and were told by the tech that the LCD screen was physically broken and would have to be replaced. The replacement of the screen would cost more than a brand new TV and the TV is not longer under warranty. After the TV is on for awhile the Black cloud goes away but it always comes back when they turn the TV off/on. It stays for 20 - 30 minutes sometimes. The Tech took both top corners of the TV and pushed one back and pulled one forward to show them he could recreate the problem after the black blob cleared up. By twisting the corners he made the blob reapper which he claimed was becuase of the damaged screen. I have no idea how the screen was damaged? I helped them take it out fo the box and set it up. We never dropped it bumped it once? It's never falled off the stand so go figure? It would be nice to find more people with this issue and get a recall going. Something that expensive should last longer than to two years.

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1 Answer

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