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Why is my tv turning on then off then on then back off?

So the tv is turning on, the vizio logo appears then instantly go black then it shows the screen again like its on a channel then back off. Tried taking out the batteries in the remote, unplugging it and back in, unplugged it and held power button for 1 min and plugged it back in, pushed the power button like 20 times or more, tried a different controller, all same results over and over again.

Update (01/12/2022)

Just trying to turn on, just flashes like this @oldturkey03

Update (01/22/2022)

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Update (01/22/2022)

Inside

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Update (01/23/2022)

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Update (01/23/2022)

Disconnect this?

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@oldturkey03

Update (02/07/2022)

Ok @oldturkey03 I just got the new board in, hooked it up and now the (power) white light stays on for maybe a second or 2 longer and has a little slower fade but the picture does the same thing except now I don't see a second flash. I even unplugged the video ribbon cable and same result.

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41 opmerkingen:

@helpmeplease_20 do you have any audio? When you say your TV turns off does it turn off or is it just your screen that turns black? What does the power LED show? When the screen is black shine a flashlight beam at an angle against the screen. See if you can make out any shapes etc. When you "unplugged it and held power button for 1 min and plugged it back in, " did you disconnect All Devices? Firestick etc as well as cable or sat box?

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When your TV is repaired, make sure it is well ventilated to avoid it overheating.

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@oldturkey03 Ok, so I just replaced the main board and still doing same thing. Posting a video now.

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@helpmeplease_20 shine a flashlight beam at an angle against the screen. See if you can see the Vizio symbol or anything else on this screen. This could be a backlight issue since it flashes quickly. Looking at your Power LED it actually turns off and back on. Since you already replaced the main board you need to check your power board. Typical Vizio, nothing easy :-)

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Just trying to turn on, just flashes like this @oldturkey03

[video|3763]

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@oldturkey03 Unsure about audio. I believe the tv turns off but not sure. The power indicator is white when I hit the power button and then slowly fades off after like 1 sec. Nothing is connected to the TV. I did take all the screws out, popped the back cover off, and took out the main board and it is burnt as indicated on the back. Ordering a replacement board and will post a update after installation. And for the flashlight deal, guess I didn't think of that. Will try that next time but for now, since the board is burnt I'd rather not put everything back together lol.

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3 opmerkingen:

@helpmeplease_20 "took out the main board and it is burnt as indicated on the back" good indication that the Main board is toast. Post some images if you don't mind. Just to see what area of the main board has failed. Voeg afbeeldingen toe aan een bestaande vraag

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@helpmeplease_20 It's a Vizio so no surprises there :-) I have not seen a single board setup but it is of course possible. There is a reason why Vizio does not supply any service manuals etc. remove the cover from the back of your TV and post some pictures of what you see. Edit your QUESTION to add images Voeg afbeeldingen toe aan een bestaande vraag

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Andrew zal eeuwig dankbaar zijn.
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