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My 55 inch LG 55LB5550 keeps blinking on and off, what does that mean?

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  • Ken Linville
    Ken Linville Oct 15, 2019

    I had the same problem with my 55in I simply placed a 4 inch fan in the back of the screen near The the power cord and let it blow through the vents to the other side. It works great now. Must be the heat causing the problem. Any way it works now.
    Good luck
    Ken

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  • LG Master
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How many blinks

Posted on Oct 27, 2017

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6ya6ya

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Posted on Jan 02, 2017

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I have an LG 55 inch TV, model no.# 55LB5550-UY. When I plug TV into the outlet the screen flashes on and off rapidly. I have changed the power supply and the main board. Neither resolved the issue.


Sounds like an issue with the motherboard or a short in the screen circuits.
As it usually costs more to replace this than most sets are worth I suggest purchase a new one.

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Power supply schematics for LG TV LG 55LB5550 Thank You.


If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Circuit diagrams of many popular brand TVs and other devices are given.
Schematics can't be uploaded by this window.

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http://electronicshelponline.blogspot.com/
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Otherwise, you would just enable Miracast on your phone and choose the TV as a device. They sell HMDI adapters that will accept Miracast signals and display them on the TV.

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