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Vizio M55-F0 Coloured Vertical Bars, initial image fades away

I have a Vizio M55-F0 that has started acting up. The TV no longer displays a proper image but I have verified that both the LED backlight and the audio output is working fine.

On wake up one of two things happen:

  1. Blank screen shows up but LED backlight is on
  2. Menu / Vizio UI image shows up but slowly fades away

The video shows what happens when I press the Netflix button. The TV displays vertical bars. Other inputs generate other sequences of coloured lines.

Hoping someone has experiences with such issues and can point me in the direction of a fix? Is it a bad t-con board, main board etc.
Thanks!

T-Con Board

Block Image

LED Board

Block Image

Power Board

Block Image

Main Board

Block Image

Ответ на этот вопрос У меня та же проблема

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@brokevizio since the menu still shows (before it fades away) I'd go with the T-con board first. But, since the menu does fade it could be the main board. Worst case would be the LCD driver board but that is unlikely. There are no schematics for this make/model so we are somewhat limited with these repairs to doing board exchanges. I would see if you can get one inexpensive second hand from places like ebay etc.

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Thanks for the suggestions @oldturkey03! I'll try picking up a t-con and main board and see if swapping one out works.

What are the odds it's an issue with the ribbon cables? I don't see any obvious issues with them but wondering if that's a possible cause as well

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@brokevizio anything is possible with Vizio's but I have seen more bad boards than bad cables. Depends on your environment, it is possible to get corrosion on the cable ends. It's always good to check for it.

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I have the same problem on Vizio M55-F0, blank screen with back light on. The back light will change when press menu button although there's no menu ui screen.

Did you solve the problem? It's T-con board or main board problem?

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