Question about Vizio L37 Television

5 Answers

Vizio L37 has faded/weak picture, lacks color and contrast

I have a Vizio L37 LCD HDTV. Regardless of input source, the picture looks washed out, faded, lacking the vivid color and contract it once had. This just happened all at once, no slow fading out or anything like that. I have adjusted the set contract and color to try and compensate for this witout success. I would appreciate any diagnosis and how to fix the problem.

Thanks,

Posted by on

  • 5 more comments 
  • greh3595 Mar 02, 2009

    I have tried unplugging the unit as suggested and have checked the fuse. The picture has not improved.

  • greh3595 Mar 02, 2009

    The suggestion is to check out the screen for humidity, however, there was no instruction as to how to check the screen for humidity. The picture on the screen is uniformly faded or weak. The TV has not been exposed to changes in temperature or humidity and has been in the same location for well over a year before developing this problem.

  • greh3595 Mar 04, 2009

    The two "solutions" posted so far: Unplug the TV and check the screen for humidity have not addressed the problem. See original entry for description of the faded, washed out LCD screen.

  • greh3595 Mar 05, 2009

    Welcomeje,



    Thanks for your thoughts on what is wrong. I have looked for a digital processing board as you suggested at the website you suggested as well as several others and have not had any success locating one. Is it possible that the board I need to replace goes by a different name?



    Thanks again for your help.

  • greh3595 Mar 09, 2009

    Ginko,



    Thanks for your comments. I think what you are saying makes sense. The Vizio L37 LCD TV (model #L37 HDTV) has a LG Philips LC370WX1 SL(01) LCD panel installed. As there is no loss of clarity, e.g., blurred picture, based on your observation it would be the inverter board that has failed as the picture is faded or dim.



    This model tv uses two Back Light Inverter boards positioned on opposite sides of the LCD. One is labeled Master (left side when viewing the TV from the rear, Part # 6632L-0197D YPNL-T010G rev. 05). The other is labeled Slave (right side when viewing the TV from the rear Part# 6632L-0198D YPNL-T010H rev. 05).



    I am wondering if both boards need to be replaced? I am also wondering how to determine whether or not similar boards with different part numbers will work? I have not found the exact replacement board for the master at Shop Jimmy or anywhere else for that matter.



    Thanks for your help.

  • greh3595 Mar 14, 2009

    I just spent $200.00 on new LCD Inverter Boards and that did not fix the problem!

  • greh3595 Mar 17, 2009

    It has been since March 4th. and I have not gotten any assistance. I have spent $200.00 on fixes that did not work. Please cancel this request and do not charge, or refund, my credit card!

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5 Answers

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  • Expert
  • 183 Answers

It seems your video chip is getting weak so its time for replacement.
Please visit following website for complete service manual:
http://www.hdtvsolutions.com/pdf/L37_manual_100505_PRINT.pdf

or you can call @ 714-668-0588 for Technical assistant or 1-888-849-4623 for toll free.

please post back if anything changes.

Good luck

Posted on Mar 04, 2009

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  • Vizio Master
  • 19,396 Answers

A faded picture on LCD is not a matter of settings or humidity.

A faded picture is an internal fault and must be fixed by a technician.

A very dim picture means that the inverter board has failed, and the inverter board must be replaced.

A blurred pictures, or a picture with no color (ensure settings are fine in this last case) means that the video processor on LCD controller board has failed, or that one channel on RGB circuits has failed. In this case you must replace the LCD control board.

You find all replacements for your TV here.

Here parts that can be defective on your TV:

Inverter.

LCD Controller.


The faulty part must be tested, and eventually replaced.

Let me know if you need further help .

Thanks.

Posted on Mar 04, 2009

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  • Master
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Symptom shows problem in digital signal processing circuit that Y-signal is missing and causing washed out picture.
You should replaced digital processing board and good source would be Shop Jimmy.
Please call there and confirm board stock and price.
Thanks.

Posted on Mar 04, 2009

  • Shahid Electronics
    Shahid Electronics Mar 05, 2009

    Some parts shops call it Main Board as shown HERE ( it is just for reference only, not exact model board)
    Kindly take off back cover of your TV and post a snap of boards here so it will give better idea what board and where is located in your TV.
    Thanks.


  • Shahid Electronics
    Shahid Electronics Mar 09, 2009

    Your response,
    "Is it possible that the board I need to replace goes by a different name?"

    My answer..
    You are asking compatible or equivalent board. I'm not sure about it and part shop can assist you better when you show them TV defective board.
    TV will not show picture or menu if inverter got defective.

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  • 113 Answers

Hi there,
check out the screen for Humidity.

neo

Posted on Mar 01, 2009

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  • Master
  • 1,550 Answers

Try reset .

Unplug the unit from power chord for 30 minutes and plug back the power chord to the unit .
This will reset your unit .


Also check the fuse in and around the power supply board .

Posted on Mar 01, 2009

  • SAM ANDERSON Mar 03, 2009

    Did you check the backlight ?

  • SAM ANDERSON Mar 17, 2009

    Did you check backlight ? And also can you post the details of inverter you replaced ?
    How old is your tv ?
    There is chance of bad panel if it is very old .


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