If the problem goes away when you select a different source or input, then you may have a faulty connection (see Cable Connections), or the device connected to the TV may be faulty.
If the color problem is always there no matter what source you are watching, then it could either be 1.) an improper picture setting, 2.) a faulty or improper cable connection, or 3.) a faulty printed circuit board.
The following two tables list various color anomalies. The first table lists problems that cannot resolved by making adjustments to settings, whose solutions are discussed in the paragraphs(s) marked with an X. The second table lists problems that can be resolved by making adjustments to settings.
|Symptom||Cable Connections||Circuit Board|
|There is no color at all||X|
|Blues and reds are reversed||X|
|Only blue and yellow, but no red||X||X|
|Only red and green, but no blue||X||X|
|Picture is weak, pasty, or flat||Picture or Contrast||Right (or up)|
|Skin tone is too red or too purple||Tint or Hue||Toward green|
|Skin tone is too green||Tint or Hue||Toward red|
|Colors are too pale or weak||Color||Right (or up)|
|Colors are too bold or vivid||Color||Left (or down)|
|White is too blue||Color temperature||See below|
|White is too yellow or orange||Color temperature||See below|
|Skin tone is too orange||Color||Left (or down)|
|There is no color||Color||Right (or up)|
To make adjustments to the settings, grab the remote that controls the TV's menu, press the 'Menu' key to display the main TV menu, and select the 'Picture' option. This will display a range of settings. Adjust the Setting according to the chart. The Direction in the table refers to the way to change the setting. It is typically left or right, where left is less, and right is more. Some TVs orient their settings vertically (those directions are in parenthesis).
If the remote control is not available, the adjustments can be made using the push buttons found on the television itself. The Menu button will display the main menu. The cursor in the displayed menu can be moved using the Volume Up, Volume Down, Channel Up and Channel Down buttons. Navigating with these buttons can be difficult. The literature that came with the TV can show you how to use them.
You can exit the menu on the screen by pressing the Exit or Menu button on the remote. Also, if you wait too long without making any changes, the menu will disappear on its own.
How to adjust the Brightness setting
"Brightness" is a bit of a misnomer. The brightness setting on your TV has more to do with the "blackness" of the blacks than anything else. If the blacks are too dark, turn up the brightness. If the blacks are gray, the brightness needs to be turned down.
How to adjust the Color Temperature
Many TVs have a setting known as "color temperature". When the entire picture has an undesirable yellowish cast or bluish cast, it may be due to the color temperature setting. The problem will mostly be noticed in the areas of the picture that should be white.
The best setting for the color temperature is a matter of personal preference, but it will be significantly influenced by the kind of ambient light there is in the room. To the observer, the picture will seem to have the correct color temperature when it is set to most closely match how your room is lit. That is, whether there is daylight coming in from the windows, or whether the lamps in the room are lit for the evening.
The names given for the different color temperature settings vary among TV brands but there are generally three, and are commonly named Warm, Cool and Normal. The Normal setting produces a picture with a daylight cast, to match the ambient light in the room during the daytime. The Warm setting gives the pictures a candlelight cast. This setting is more appropriate for evening viewing, and is the most psychologically relaxing. The Cool setting produces whites that are more bluish (like that of high-end headlights on automobiles). This setting is meant to make the picture more bright or vivid, and is usually the way the TV is set when it's fresh out-of-the-box from the factory, or being demonstrated on the showroom floor.
More technically, color temperature is measure in degrees Kelvin. The color temperature of sunlight is about 6500°K, which is what the "Normal" setting would give you. On the other hand, the "Warm" setting produces a picture with a color temperature of about 3000°K, and the "Cool" setting would be about 8200°K. As you can see, the sense of this terminology (e.i. warm to cool) does not match with the direction of the scientific metric, but rather the asthetic feel of the cast. In fact, the terms "warm" and "cool" actually relate to how artists view color, in that reds are warm colors and blues are cool colors.
The settings mentioned in this article are the common ones that you will find on nearly every TV. But within the Picture menu there may be more settings that could change the way the colors look. These settings are specific to the brand and model of television that you have. To learn what they are and how they will affect the picture, consult the owner's manual.
Component video cables that are not connected properly between the source and the TV can produce pictures with wrong colors. Conventionally, at both ends of the bundle, the green connector will connect to the Y jack, the red connector will connect to the Pr jack, and the blue connector will connect to the Pb jack. Keep in mind that the connectors are color-coded simply as a convenience so that they can be uniquely identified. The signals in these cables really don't care what the colors of the connectors are, as long as the particular signal coming from the source connects to the proper input at the other end.
The following chart lists the Symptoms that are related to faulty component video Cable connections along with which signal cables would be at fault.
|Reds and Blues are reversed||Red (Pr) and blue (Pb) are swapped at one end|
|Only blues and yellows, no reds||Red (Pr) cable is not connected|
|Only reds and greens, no blues||Blue (Pb) cable is not connected|
|Black and white, no color||Both red (Pr) and blue (Pb) cables not connected|
|Hash or dot pattern crawling upward with the picture behind it||The green (Y) cable at the source is wrongly connected to the neighboring yellow video output jack|
|Intermittent or flickering changes in color||A bad cable, or a cable plug not firmly seated into its corresponding jack|
If you can't seem to get the colors right by changing channels, or by making adjustments to the TV picture settings, or by changing the cable connections, then you are probably dealing with a faulty device. Determine which device is faulty by switching inputs. If the problem is always there no matter what you select as your input, then your TV is the culprit. Continue reading.
Cables can become intermittent or go bad at their connectors. This can happen when the cable is disconnected repeatedly by grabbing it by the cable itself and tugging, rather than grasping the connector to disconnect it. Repeatedly unplugging and plugging in cables can also damage the female connector on the TV causing an intermittent connection as well. To tackle this problem you will need to gain access to the printed circuit board (see How Do I Get To the Circuit Boards in a TV?).
If the connector does not feel loose when you rock it back and forth, but the connection comes and goes, then there is probably a hairline fracture on the printed circuit trace to which the connector is soldered. If this is the case, then the board will either need to be repaired or replaced. It can be repaired by locating the broken trace, scaping the solder-resist off of the trace on either side of the fracture to expose the actual copper trace, and then reinforcing the trace with solder. If the connector feels loose to the touch, then it is likely that the printed circuit board has a crack in it, and will need to be replaced (see Circuit Board below).
The printed circuit board in your TV that would most likely cause these kinds of issues is called the 'Main Board', or 'Signal Board'. It is generally the one that is populated with all those connectors for connecting various devices to the TV that are accessible in back of the TV.
Sometimes the failure could be caused by the actual connectors (jacks) on the printed circuit boards themselves. They can become electrically intermittent due to excessive mechanical stress from either 1.) the wear and tear of constantly plugging and unplugging cables into them, or 2.) the constant physical weight or tension imposed on them by the cable.
Whether the problem is with the board-mounted connectors, or some other component on the Signal Board, the board would definitely need to be replaced, and this web site can show you how to replace it. The articles How Do I Get to the Circuit Boards? and Replacing Circuit Boards in a TV provide useful information.