Vizio D50u-D1 4K tv - slow back light flicker.

[crees]

Working on a Vizio d50u 4K tv. Powers up fine but the backlight would flicker slowly. Screen appears to be just fine and the fraction the light is working it can be seen. I Was fortunate to have a donor cracked screen tv and I replaced all boards but the flicker is still happening. Down to the backlight LED's.

After Replacing all boards (but the tcon) I left the tcon disconnected and the problem still continues. Even with the tcon disconnected and the problem being the same do I need to replace it (tcon)?

Here is the youtube video showing the flicker

https://youtu.be/OYybvInad7w

Next step is to pull the leds out of the donor tv and install them....

Has anyone seen this before and was it the led's Or cables to them the cause? I suspect a short? Interestingly if I disconnect either side led cable one at a time the flicker continues for that side.

Help me bad cap Kanobi. Your my only hope.... if the led swap doesn't work.

[crees]

Re: Vizio D50u-D1 4K tv - slow back light flicker.

After more research It appears that I have multiple LED strip issues. After Replacing them I will report back. TCON shouldn't have anything to do with it. I was curious if it had any feedback mechanism that could contribute to the issue.

[ap4414]

Re: Vizio D50u-D1 4K tv - slow back light flicker.

Did you figure out if the problem was limited to the LED strips? I seem to have the same issue.

[cbsantos]

Re: Vizio D50u-D1 4K tv - slow back light flicker.

Did the replacement of the LED strips solve the issues of flickering?

[handsworth]

(SOLVED) Vizio D50u-D1 4K tv - slow back light flicker.

I have the same tv with the same problem. Flickering from side to side. Problem is a bad led driver. After researching, it seems that the bad leds corrupted the driver. After replacing all leds with new strips Flickering started. I'm not good at repairing boards so I just bought a new driver. Problem solved