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My TV won't turn on after replace the main board

Hello,

My Samsung UN43MU6300 just did not turn on; no power light ; no sign of life. I replaced the power board, same thing. So I replaced the mainboard as well. Now, here is the interesting part.

  • The power light is up now
  • but TV just flashes up white at lower part of the screen repeatedly in every 20s-30s. No Samsung SmartTV text or logo shown as before.

*

I am not sure the TV is supposed to work after replace the mainboard, or do I need to do something like -pairing- the board, or something :(

Please advise.

Thank you.

Sammy.


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@blueocean123

this “TV just flashes up white at lower part of the screen repeatedly in every 20s-30s.  “ sounds like your backlight array. Try to disconnect the power board from the main board and turn your TV on. Let us know what the backlight does.

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I just found out the mainboard I replaced might be incorrect part :( Can you advise?

Original mainboard: BN97-13470U BN94-12431A

The one I replaced: BN97-13470S BN94-12437F

Hix, the one I bought was advertised to use on same TV model :(

의

It is possible that this is caused by the wrong version of your main board. after all, it is the main board that signals the power board to turn the backlight on. disconnect the main board from your power board and see if your backlight comes on and stays on.

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