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Device repair and information for the Vizio D-series 50" LED television with model number D50n-E1.

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Backlight went out, replaced power board, made it worse.

So I got a clearance 50” Vizio 4k Smart D Series TV from a Walmart. It was one of the wall displays so I got it for SUPER cheap. I had it running for 3 weeks with no issue and then it started flickering. Eventually, the backlight went out completely and I read to replace the power board so I ordered one off shopjimmy.com. Except hey didn’t have only the power board so I ended up having to order the power board, inverter, and AV connection board. However, the inverter board was NOT the correct board even though I know it was for the exact model of my TV which I am going to have to call them for. Anyway moving on…

It came in, I replaced the power board and the TV turned on… for 10 minutes and then the backlight went out again.

Here are some observations I made while troubleshooting and trying to figure it out on my own:

  • After a power cycle, when I turn the TV on the power light on the TV flashes once and then comes on then goes into the second point here:
  • When turning on the TV, the LED light indicator comes on and then slowly fades off.

Any input into the matter would be really helpful. I’m between jobs right now so money is kinda tight and I can’t afford a new TV at the moment.

Answer this question I have this problem too

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@kdouble

post some good pictures of your boards with your question. That will allow us to see what you see. Also, let us know the exact model for your TV and if you maintain audio or if you lose that as well. Adding images to an existing question

This does sound like a power situation. You will need to use a multimeter and measure the voltages from the power board to the main board as well as to the LED’s. Vizio is known to use a hodgepodge of parts and does not support any DIY attempts. So schematics etc. are hard to come by. Also, Vizio is plagued by poor solder on connections for the ribbon cables. Check for cold solder joints.

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kiel dublu will be eternally grateful.
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