Vizio M65-F0 white light flashing on screen

[brandhr]

I have a Vizio 65” M65-F0 that was put into service during 02/2019 and is probably used less than five hours a week on average. The white light in the picture flashes on and off about once every two seconds no matter what I am using for the source. The sound and picture are fine otherwise— so very noticeable/annoying if the scene is dark, not as noticeable when the scene is bright. My questions are: 1. Will replacing the LED strips fix this problem or is it likely a board issue? 2. If it is an issue of replacing the LED strips, should I replace them all or can I just replace the one that is flashing? Thanks.

[xfox]

Those Vizio TVs have intelligent full array led blah-blah-blah, main board connected to led driver board with with digital protocol, so I would check driver first for that specific line

[budm]

http://cdn.vizio.com/user-manual/PDF...ies_UM_ENG.pdf

See page 14
Try setting the the Pictures mode to Standard.
Auto brightness to off
Backlights level to 50%
Then see what will happen, you may have to do this on all input sources settings.

[neilc6]

I would turn off all the local dimming features.

Black Detail - Adjusts the average brightness of the picture to compensate for large areas of brightness. Select Off, Low, Medium, or High.
• Xtreme Black Engine™ - Based on the content, dynamically adjusts and balances the brightness and the contrast ratio of the picture by locally adjusting backlight zones.
• Clear Action - Reduces blur in scenes with fast action but limits the range for the Backlight setting.

[brandhr]

Thanks for all the responses. I made all the suggested setting changes and no improvement. As far as checking the LED driver board as suggested by xfox, that may be beyond my capabilities. I can generally follow YouTube videos on replacing boards/components but not sure how to check a board (other than looking for the tell tale brown/burned spot). I did find a YouTube video on how to replace the LED Light strips so thought I would ask to see if that could fix the problem. Looks like the LED driver boards are relatively cheap— would it make sense to try replacing that board? If that doesn’t fix it, would it make sense to replace the light strips? Thanks again.

[xfox]

If you have a multimeter just check voltage on blinking leds, if not, try new led driver board, just buy on ebay with return option...

[budm]

But did you try what we suggested you to try on post #3 & 4?

[brandhr]

Originally Posted by budm

But did you try what we suggested you to try on post #3 & 4?

. Yes, as stated I made all the suggested settings changes and no improvement. I do appreciate the suggestions.

[brandhr]

Thanks for the additional info on the board. I will order a new board and see if that fixes it.