Question about Vizio VU42L 42 in. LCD TV

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TV Turns On, Backlight On But LCD Screen Black, TV Won't Turn Off

The TV was on when the problem first occurred. Just a black screen and the power button will not turn it off. Called Vizio and tried a hard reset but to no avail. Basically, I hit the power button. Then the backlight comes on, but the LCD screen remains black. Finally, I have to unplug it from the wall because the power button will not shut it off.

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 10 Answers

SOURCE: Vizio screen went off but power light is still on

may be a mainboard problem. If you can see the orange light it usualy means that there is power running through the TV... usually inverter boards are a problem when you do not see any backlight at all.

Posted on May 23, 2009

  • 92 Answers

SOURCE: No Screen or sound

there are two possibilities to this problem. First and cheapest way is to replace the main board. Second, replace the inverter board. This is the boards that are mounted vertically on both sides of the TV.

Posted on Jun 18, 2009

phongnv
  • 56 Answers

SOURCE: vizio p42 very dark screen backlight off

There is no back light in plasma TV, Base on the description, the Z Sustainer board is bad. Replace the board will fix the problem.

Posted on Feb 17, 2009

  • 13 Answers

SOURCE: VIZIO TV Black screen. Cannot turn off TV without unplugging.

I had a similar problem after having a Vizio for 2 and a half years. I left the room for a minute, i came back and the screen went black. I didnt hear an arcing sound though. There was still power to the unit and you could see that the back light was working, just no picture, no sound, and you couldn't use any of the buttons. The only way to turn it off was to unplug it. It would then start up, with the Vizio logo going from orange to white, and then do the same thing all over, no pic or sound. I would check the ceramic fuse first on the board that gets power from the plug.

HOW I FIXED MINE: I ordered a new "main PCB" from tigerdirectparts.com (you can also use searspartsdirect.com). This is the circuit board with all of the inputs on it (hdmi, cable, etc.) I opened it up, disconnected the old one, put in a new one and now it works fine.I used both serial numbers on the board to search for it online. It cost me $144 to do it, but that's better than $450 for a new TV. My tv is the vx32l hdtv10a. I hope that helps.

Posted on Jan 22, 2010

  • 13 Answers

SOURCE: my vizio vx32L turns on but only a black screen shows up

I had the same problem after having a Vizio for 2 and a half years. I left the room for a minute, i came back and the screen went black. There was still power to the unit and you could see that the back light was working, just no picture, no sound, and you couldn't use any of the buttons. The only way to turn it off was to unplug it. It would then start up, with the Vizio logo going from orange to white, and then do the same thing all over, no pic or sound.

HOW I FIXED MINE:Look through the back vents for a white light to make sure the backlight still works. I ordered a new "main PCB" from tigerdirectparts.com (you can also use searspartsdirect.com). This is the circuit board with all of the inputs on it (hdmi, cable, etc.) I opened it up, disconnected the old one, put in a new one and now it works fine. I used both serial numbers on the board to search for it online. It cost me $144 to do it, but that's better than $450 for a new TV. My tv is the vx32l hdtv10a. I hope that helps.

For me the part number was either (depending on the vendor) : 0171 2272 2174 or it was 3632 0212 0150. Check your circuit and see if any of those numbers match up.

Posted on Jan 22, 2010

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oh, so that's your problem. I'm willing to bet you have a picture but just no backlight. Now does the screen come on briefly when you first turn the TV on? Or is the screen black at all times?? Turn on the TV, turn off the lights in the room. Take a very bright flash light and shine it one the screen.I bet you see a dim picture. It sounds like you have a backlight problem. Either you are missing 24VDC from the power supply, 3.3VDC "backlight on" signal from the main board, a bad inverter, or a bad backlamp.

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Hello
Check the backlight inverter board to your TV. This is a common fault for most of the LCD TVs. If it is faulty, the backlight won't light up, resulting a balck screen with sound.
This is the picture of the backlight inverter board to your TV. OK.12_23_2011_4_29_45_am.jpg

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