I have a Samsung LNT4066 LCD television. The Settings are set to Default Settings(Dynamic Light, COOL 1, etc) and I am still getting a reddish tint across the whole Picture. What is wrong?

assuming you gave checked the menu settings for the video out, I would say your plasma panel board may need to be replaced

redish tint in what explain the problem in detail.

This may help you...you can also get an owners manual free on line.


English - 23
Using Automatic Picture Settings
Your TV has Three automatic picture settings ("Dynamic", "Standard", "Movie") that are preset at the factory.
You can activate either Dynamic, Standard, Movie by making a selection from the menu.
1. Press the MENU button to display the menu.
Press the ENTER button, to select "Picture".
2. Press the ENTER button to select "Mode".
Press the ??² or ??¼ buttons to select the "Dynamic", "Standard", "Movie" picture
setting. Press the ENTER button.
?³ Choose Dynamic to increase the clarity and sharpness of the picture.
?³ Choose Standard for the standard factory settings.
?³ Choose Movie for a natural Image without picture enhancements.
3. Press the ??² or ??¼ buttons to select "Contrast", "Brightness", "Sharpness",
"Color", or "Tint(G/R)", then press the ENTER button.
4. Press the ??? or ??? buttons to decrease or increase the value of a particular item.
For example, if you select "Contrast", pressing the ??? button increases it.
Press the ENTER button.
Press the EXIT button to exit.
• When you make changes to Contrast, Brightness, Sharpness, Color, Tint(G/R)
the OSD will be adjusted accordingly.
• When in PC mode, Tint, Sharpness, and Color are not available.
Press the P.MODE button on the remote control repeatedly to select the desired
picture mode.
Picture Control
Move Enter Return
Mode : Dynamic ???
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balck light 1 00
??¼More
TV Picture
Move Enter Return
Mode : Dynamic
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balck light 1 0
??¼More
TV Picture
Dynamic
Standard
Movie
Move Enter Return
Mode : Dynamic ???
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balck light 1 0
??¼More
TV Picture
50
??² Con trast ??¼
Move Adjust Return
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Adjusting the Color Tone
You can change the color of the entire screen according to your preference.
1. Press the MENU button to display the menu.
Press the ENTER button to select "Picture".
2. Press the ??² or ??¼ button to select "Color Tone", then press the ENT ER button.
3. Press the ??² or ??¼ button to select "Cool2", "Cool1", "Normal", "Warm1",
or "Warm2".
Press the ENTER button.
When the picture mode is set to Dynamic or Standard, Warm1 and Warm2
cannot be selected. Movie mode is only available.
Move Enter Return
??²More
Color Tone : Cool2 ???
Detailed settings ???
Size : 16 : 9 ???
Digital NR : Low ???
Active Color : On ???
DNle : On ???
Reset : OK ???
TV Picture
Move Enter Return
??²More
Color Tone : Cool2
Detailed settings
Size : 16 : 9
Digital NR : Low
Active Color : On
DNle : On
Reset : OK
TV Picture
Cool2
Cool1
Normal
Warm1
Warm2
Activating Backlight
You can adjust the screen brightness by adjusting the LCD backlight brightness. (0~10)
1. Press the MENU button to display the menu.
Press the ENTER button to select "Picture".
2. Press the ??² or ??¼ button to select "Backlight", then press the ENTER button.
3. Press the ??? or ??? button to decrease or increase the valueof the backlight
brightness.
Press the ENTER button.
Press the EXIT button to exit.
Move Enter Return
Mode : Dynamic ???
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balcklight 1 0
??¼More
TV Picture
5
??² Balcklight
??¼
Move Adjust Return
Move Enter Return
??²More
Color Tone : Cool2
Detailed settings
Size : 16 : 9
Digital NR : Low
Active Color : On
DNle : Off
Reset : OK
TV Picture
OK
Cancel
Resetting the Picture Settings to the Factory Defaults
1. Press the ??² or ??¼ button to select "Reset", then press the ENTER button.
Press the ??² or ??¼ button to select "Cancel" or "OK" then press the ENTER button.
Press the EXIT button to exit.
Each mode can be reset.

Best is kind of subjective since each person's eyes are different. If you are looking for a bright and vivid picture, you can go to the picture mode and change it to that setting. Usually it is called something like "Vivid" or "Dynamic." Besides that, it is all user preference. Most people prefer to just use the factory default settings.

Try these, Contrast: 53 Brightness: 56 Color: 45 Tint: 2 Sharpness: 2 
Color temperature: Off
Dynamic contrast: Off
Digital Natural Motion: Off
DNR: Off
Color enhancement: Off
Active control: Off

your light engine needs to be replaced, iv done about 20 of thease, if your under warinty, call your warinty company, if not, yhe part is around 400 dollars, it is a hard one to change yourself

I'm happy with:

backlight +16
contrast +40
brightness +1
colour -13
tint 0
shaprness +2

although I found this setup but haven't tried it yet

backlight +5
contrast +24
brightness -7
colour +50 (review I found didn't say + or -. Try both
tint 0
sharpness -5

Len

it depends on what your using it for, adjust colour tones to what you think looks natural, contrast between 80-90, keep sharpness below 30. just have a play around till you find what best suits the source material.

sure, lcd tvs need to be tweeked depending on the light in the room the darker the worse the picture. so try this
from standard:
picture: 85 to 95 %
brightness: 45% or adjust the black of the video to the black of the pilar bars to equilize them.
color: 32 to 38% or until the flesh tones are not so hot
sharpness: low 10%
tint: always to center
color temp: cool1
back lamp ( if avalible) low when lights are dim, high when lights are bright.
the problem with LCD is they don't look so good with dark sceens. the contast ratio is very low. natively 3000:1 aas compaired to plasma or other direct view TVs. the LCD is back lite and the thin materal of the LCD can not completely block the back light from coming thru. there for the complete "black screen" is illuminated "blue". the best thing is to keep the lights on bright in the room for the best picture.

This can be one of two things, I think this set was manufactured in 02 so it would be atleast 6yr.old so saying that could be 1. Fluid contamination problem or 2. Clean Spark gaps problems. The first is when you observe the fluid above the CRT's and see if it looks cloudy and contaminated. 2. The cleaning of the spark gaps are most likely the problem. But this requires knowledge of what to do and what not to do. This is a Dangerous area full of High Voltage. So you would need to know how to discharge set before servicing. Carefully not to damage anode leads to set. For more info on this you can visit ctechnicians.com