Original topic:

Samsung 55 inch TV

(Topic created on: 11/28/20 3:15 PM)
userIIrX9fCeMn
Constellation
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HD and UHD TVs

I have a Samsung 55 inch TV that has a constant backlight flicker with no image on the screen. It shows a black picture and the light flickers off and on and nothing more. I've pinned the problem down to the main board and I can get the tv to work again by using a heat gun or hair dryer on the main board itself. What would cause the backlight to constantly flicker like this and applying heat to the board itself make the image work properly? 

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Samsung01
Astronaut
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HD and UHD TVs
Flickering and dimming are common problems on modern flat-screen televisions. Like other manufacturers, Samsung incorporates several technologies into its displays that have the potential to cause these issues. Sometimes image-stabilization or energy-saving features don’t function as intended and cause flickering. It is also possible that a cable or other piece of external hardware is responsible for your flickering problem. You can troubleshoot all of these causes by yourself.

1

Disable the Eco Sensor feature. Locate this setting under “Settings” in the main menu. Turning the Eco Sensor off disables the automatic ambient light brightness adjustment, which can be a source of flickering.

2

Disable the Energy Saving feature. Locate this setting under “Settings” in the main menu. Turn Energy Saving off to prevent your Samsung TV from automatically adjusting brightness based on the show you are watching. This may solve your flickering problem.

3

Test your Samsung TV on a different source if flickering persists. The issue could be caused by a faulty cable, bad connection or malfunctioning receiver or Blu-ray player.

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userIIrX9fCeMn
Constellation
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HD and UHD TVs

Eco Sensor is off and energy saving feature is off as well. Source of the tv doesn't matter, once you hit the power button the tv turns on to a black screen with the backlight flickering from off to on and this repeats. However, if i open the tv up and blow hot air ( Hair Blow Dryer) onto the main board and then reseal the tv everything will work as normal. This is a known issue to the main board and a google search reports this issue everywhere but no solution. I have ordered new thermal paste for the cpu/gpu due to the current paste being hard as a rock but again once I apply heat to the board itself the problem goes away. This is not a feature issue due to everything already being off. 

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