Question about Vizio L42HDTV 42 in. LCD Television

2 Answers

Green tint like lightning across the screen and on black images.

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  • dean_shortri Sep 09, 2010

    sporadic patches of green all over the screen - most visibly in black areas. Not the same position all the time. Sort of like when you put too much tint or color when you adjust the color. This just started to occur about a week ago. No reason or nothing new occured. lt is watchable but not enjoyable. It is better when watching golf on a green background.

  • dean_shortri Sep 11, 2010

    What is a t-con board and where can I buy one? I will start with the posting that said I should take the back off and clean all the insides especially around the radiator inside. I'll give it a shot..

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2 Answers

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  • Master
  • 4,889 Answers

You have a faulty t-con board. Have seen this problem a million times. Replacing it should resolve the issue. The part costs about 75-125$. Let me know if you want to do it yourself so that I can guide you with the repair.

Posted on Sep 09, 2010

  • eagle338
    eagle338 Sep 13, 2010

    T-con is the timing control board that is responsible for producing an image on the screen. It has a pair of ribbon connectors going into the panel. You can buy it on stores like shopjimmy.com .

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  • Vizio Master
  • 11,800 Answers

If it's there in the same position and looking the same then the defect is in the LCD panel. Sorry this is terminal: the screen can't be repaired and a replacement one will cost way more than a new tv.
If the problem is there in the same general location but changes the position and look slightly every time then the processor on the mainboard is defective - the mainboard must be replaced.

Posted on Sep 08, 2010

  • Azrael SRL Sep 09, 2010

    In that case it's definitely a problem with the image processor. Since it can't be replaced on its own you will have to replace the entire mainboard. But you might be lucky and this is just an overheating problem: take out the back cover of the tv and clean it thoroughly. Be especially attentive at the radiator on the processor and at the air vents on the case.

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Posted on Jan 02, 2017

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Picture settings



Colorimetre HCFR software
AVC HD 709 calibration disk
Spyder2 colorimeter (I know most prefer the Eye-One meters, but the Spyder2 was available from my job at no cost)

Here are the settings:

PS3 Blu-Ray player

Output Format (HDMI): Y Pb/Cb Pr/Cr (important!!! NOT RGB output)
BD 1080p 24hz Output (HDMI): On (this TV can reproduce video at 48hz for accurate 2:2 pulldown)
Y Pb/Cb Pr/Cr Super White (HDMI): On (not sure if this matters)

42LG50 Settings

Aspect Ratio: Set By Program (Personal Preference)
Picture Mode: Expert 1
Backlight: 50 (Personal Preference)
Contrast: 54
Brightness: 54
Sharpness: 40 (Personal Preference)
Color: 50
Tint: 0

Fresh Contrast: Off
Noise Reduction: Off
Gamma: Medium
Black Level: Low
Real Cinema: On

White Balance: Warm
Method: 10 Point IRE

10 (-3,8,-16)
20 (15,24,-21)
30 (20,36,-22)
40 (3,19,-40)
50 (8,34,-41)
60 (10,50,-20)
70 (-5,50,-8)
80 (-16,50,18
90 (-14,50,30)
100 (-22,38,21)

Red Color: -3
Red Tint: 0
Green Color: 10
Green Tint: 0
Blue Color: 14
Blue Tint: 0
Yellow Color: 0
Yellow Tint: 1
Cyan Color: -11
Cyan Tint: 0
Magenta Color: 0
Magenta Tint: -2

Take time to get used to the settings, you may think the screen looks dull at first. The truth is most people have way too much contrast on their TVs.
These settings will also work for Cable or Dish hookups, in which case you may change the Noise Reduction option to Medium to reduce signal noise.

OR....

2POINT IRE

Backlight: 65
Contrast: 55
Brightness: 45
Sharpness: 50
Color: 45
Tint: 0

Fresh Contrast: Off
Noise Reduction: Off
Gamma: Medium
Black Level: Low
Real Cinema: On

White Balance: Warm
Method: 2 Point

Red Color: 3
Red Tint: 0
Green Color: 9
Green Tint: 2
Blue Color: -1
Blue Tint: 0
Yellow Color: 6
Yellow Tint: 5
Cyan Color: -1
Cyan Tint: 1
Magenta Color: 2
Magenta Tint: -1

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