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Why is my television flickering?

I bought this 55in LG HDTV (1080p) model 55LB5550 about two years ago. Today I had an issue come up with the tv flickering. I tried switching between inputs but still the same problem. I then unplugged and plugged in the component cables and still no luck.

I'm wondering why I'm having this issue. From what I have searched other models had the same problem but it requires a "cleaning" of ribbon cables or replacing the power inverter. In any case, I was wondering if anyone knew how to fix the problem with this model. Hopefully it's an easy fix and doesn't require part replacements.

Updated with photos:

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Thanks!

Update (08/07/2017)

Update: I just replaced the power board/LED board but still has the same problem.

Here is a video of the problem to get a better idea.

https://www.youtube.com/watch?v=6YEEJsvP...

Video

Answered! View the answer I have this problem too

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Hi Chris, open up the TV and inspect the power board, check for any bloated capacitors.

Would be great if you can add some pictures to it.

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updated with photos. hope that helps!

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anyone have an answer?

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Chris l flickering as in brightness flickering (bright/dark) or as in jittering on all the images?

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oldturkey03 . It flickers from black to the picture that it's supposed to display. Its black for most of the time then the screen will flicker. the audio is there as normal.

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Chris l yes it could be the backlight array. Bit of a PITA to work on it but really not horribly bad. Problem might be finding a replacement array. This video explains it pretty well. You may have to contact vendors like this for replacements.

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Yes, I've been using shop jimmy. I replaced the power board at first but didnt seem like that was the issue. I'm gonna try troubleshooting and seeing if the issue is the other boards. If it isn't then maybe it's the backlight led's but hopefully not just the panel itself. Cross my fingers!

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Chris l it is very doubtful that this is a bad panel. During the flickering you see the background and it does look good.

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I had this issue and replaced the LED's. Came in a pack of 10 from shopjimmy.com

Took about 2 hours to take the whole tv apart but it's a nice picture now.

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Hi, Chris.

I had a similar issue that was completely solved by baking the main logic board in the oven, for 10 minutes@210 degrees C. Preheat the oven before and let me know if that worked. Good luck.

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I realize not everybody has the same home theater components, but hopefully my story will be of some help.

I recently purchased:

- LG B7 65 OLED TV

- Marantz 1608 Receiver

- Sony X700 4K Blu-Ray Player

- Monster Ultra HD (22.5 GB Speed) Platinum HDMI Cables

(1 for 4K Blu-Ray player to Receiver, 1 for Receiver to TV)

Everything worked fine at the initial setup. My 4K Blu-ray (Planet Earth II) played great. No issues whatsoever.

I updated the firmware on the Sony player and everything continued to work great. In my enthusiasm as a movie buff for optimal picture quality I went in to the Sony 4K player settings and played with the new features and options. I launched Netflix and the blinking issue (also known as "flashing" or "screen blacking out every alternate second or two") started to occur. I initially thought it the issue was due to a Netflix HD (not Ultra HD) and/or wifi internet performance problem (good speed but poor reception where the 4K player is located).

I tested the following, running:

1) A blu-ray through a second (non-4K) blu-ray player via regular HDMI cable.

2) Netflix and YouTube through the same blu-ray player via regular HDMI cable.

3) Netflix and YouTube through an Apple TV 3 (non-4K) via regular HDMI cable.

In each of these instances, everything worked fine.

The next day I turned on the 4K player to demo the Planet Earth II 4K Blu-ray for my wife. The screen blinking issue started up from the get go with the 4K disk. I dreaded the thought of having to figure out where the problem lay between 4 newly purchased components, but then it dawned on me that:

1) When the Sony 4K player was on at the menu level, no blinking was occurring.

2) The issue started after I upgraded the firmware on the Sony 4K player.

3) I had activated some the new Dolby Vision feature,

As soon as I switched "Dolby Vision Output" off, the screen blinking stopped. Everything worked fine again.

I plan to purchase an Apple 4K TV sometime in the next few months (I'm in no hurry as I've just spent a ton of $$$). At that time I'll run further tests with Dolby Vision (on and off) and compare results with the Sony X700 player.

If blinking does not occur with the Apple 4K TV, the issue is most likely with the Sony X700 player's firmware.

If blinking does occur with Dolby Vision activated on the Apple 4K TV, then the issue is likely with Dolby Vision and/or the LG B7.

Sure, I'd like to have Dolby Vision running, but I'll live, and still enjoy watching movies with all this gear.

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Use HDMI cable 48gbps https://www.apple.com/au/shop/product/HL.... Hopefully that will solve your issue.

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Take it off vivid and make other stuff regular and it will stop.

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Chris l will be eternally grateful.
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