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Blank screen Visio tv, no sound, no backlight and failed the flashlight test model P652ui-b2

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 92 Answers

SOURCE: Visio 42in. Plasma TV

The TV is a Plasma, it does not have a "BackLight" as it were, that is for LCD's only.

Vizio are fobbing you off. It will need either a Y-Sustain & Buffers or a Z-Sustain.

Posted on Sep 07, 2009

gopakumarg43
  • 74136 Answers

SOURCE: lg led tv backlight

Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Posted on Feb 05, 2015

gopakumarg43
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SOURCE: 47' (sic) LED TV, model number m470vse. Why doesn't the backlight work?

Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.

Posted on May 30, 2015

  • 12957 Answers

SOURCE: My Visio flat screen tv model E320i-b2 has sound bot no picture, why?

Because something is wrong with the video circuits of the set - that is why the audio works and the video does not. If you want to attempt a DIY repair suggest you find out which board on the set is responsible for creating the raster or video on your set and start looking there.

Posted on Jul 13, 2015

gopakumarg43
  • 74136 Answers

SOURCE: Ok I tried the flashlight test on my tv and I can see picture and ther is sound and I don't know where is the backlight inventor in my tv how I would know what's wrong if it's back light or led prople

Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

Posted on Nov 21, 2015

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I have a 47" Philips LCD TV Oct 2008 Model # 47PFL3603D/F7 When I turn it on, it works fine for about an hour or so. Then the screen goes black, not a fade right to black. Sound is still on.


The backlight inverter is built into the power supply of this unit. When it fades to black screen, do you see any backlight at all?
If you do see some light, you have a 'blank screen' problem and the backlight is not the cause. Since you can still hear sound and can control the tv otherwise, the problem is likely in the TCON board.
If there is no light coming out, perform a flashlight test (search YouTube for details on this). If you pass the flashlight test, then try replacing the power supply board.

May 24, 2017 | Philips Televison & Video

Tip

Diagnosing a LCD blank screen problem.


Recently a 3 year old VIzio TV I bought started having problems. The set would turn on normally for a few seconds then the picture would go dark with everything else operating normally including sound. Remembering a similar laptop computer problem I diagnosed previously, I immediately suspected a defective TV screen backlight. To verify this in your own TV, get a very bright flashlight and with the TV operating in the failed blank screen mode, shine the flash light into the blank screen from various angles and distance (including touching the screen). If the LCD is still operating, you'll see a dim motion in the flashlight's reflection, thus proving it is indeed a failed backlight.

on Jan 27, 2015 | Televison & Video

1 Answer

My LG tv (Model number: 32LS3410-UB) has sound, but no picture. When I do the flashlight test I can see a very dark image on the screen. Will replacing the LED driver fix this problem?


If you already tested with the flashlight which is the first step in the blank screen with sound fault then you have to test the LED Backlight supply voltages if you are familiar and good in the electronic repair. First you have to check if bulging capacitors for the LED Backlight drive voltage circuit, replace them. If capacitors are good then you have check the backlight LEDs. The flashlight test proves that the power supply is good and TV is working fine because the sound is ok and picture is fine. Attached videos and links may help you for the repair and replacement of backlight LED strips or LEDs itself depending on the type of LED strips used in your model.
https://www.youtube.com/watch?v=Z1DEkSguWtg
https://www.youtube.com/watch?v=YgaL6X6eSaU
https://www.youtube.com/watch?v=EZVQKEp6jxk
https://www.youtube.com/watch?v=T2FboV-1PJg
https://www.youtube.com/watch?v=2pyuXwNkBMA






May 08, 2017 | LG Televison & Video

2 Answers

I have a Vizio E550i-B2 and the screen went blank, I do still have sound. I did the flashlight test and I can see the screen very dim. Would this be the LED driver board or power supply board?


Hi,
This model develops bad solder joints on the connector between the power supply and the led driver board and loses backlighting. It's hard to believe, but the whole connection goes bad. All those pins supply only 24v and gnd. Resolder all of the pins on the power supply half of the connector and the tv will work.
It's the connector between that large yellow board (p/s) and the center green board (led driver).


5_8_2017_3_54_57_pm-4geh5w0df5ixw3m0y3nq5uyg-2-0.jpg

Apr 16, 2017 | Vizio Televison & Video

1 Answer

Lg tv power light comes on but screen stays blank


If you can't see a faint picture with the flashlight then the T-con board is gone. If you can see a faint picture, then the led driver or ballasts for the back lights quit. You can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

Dec 05, 2016 | LG Televison & Video

1 Answer

Backlight for tv


One or more of the LED backlight strips behind the LCD have failed. Difficult and sometimes expensive to fix.

Jul 08, 2016 | Vizio E550i-B2 55" LED TV 1920x1080, 120...

2 Answers

I have a Vizio E550i-b2 55 LED TV. I have no LED backlight. When I hold a flashlight to the screen I can see the images and I have sound. I was going to replace the LED driver? Thoughts??


U are on the right track - problem is caused by the board that drives the backlighting - the inverter board.

If you can get the number for the board it may be available on the cheap on ebay.

May 03, 2016 | Vizio E550i-B2 55" LED TV 1920x1080, 120...

1 Answer

When testin a power supply or led board on tv do i test dc or ac with multimeter?


Your power supply board is working if you get audio and imgaes.

You test AC only the AC side of the transformer before the Rectifier Diodes. Everything after the Diodes will be in DC.

did you get to see any spec of backlight as shown in
LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Mar 23, 2016 | Televison & Video

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