<!-- from fixya rte -->How to change colour display blue to red - Alpine iDA-X200 Car CD/ MP3 Player

Sounds like a damaged screen / digitizer

Your problem may related to the green output or driver stage in your tv. Usually green calour is not tranmitted, only blue and red colour informatein are comming from transmitters. Green colour information is regenerated inside the tv by matrix network. If the matrix get damaged no green colour will be displayed. To check first; whether the TV colour picture tube's green gun is right or not. For that you must connect a resistor of value more than 470k 2W, to the green cathode of the picture tube base to earth. The connection should be done causiously, not for a long time. It is advised to do in intermittantly with just touches. When you touch the green cathode with the resistor with one side of it earthed, a green flash must come on the crt. You can do this test for red and blue too. If there is no green flash, or light picture tube may be faulty. It is a very rare case. You must check the volltages of the other two cathodes [red and blue]. The voltage at green cathode must be almost the same as other two.
Just check the green output transistor for open. If it is open, voltage at green cathode will be high. Also check the base voltge of the green output transistor. It should be around 2.5vDC. You can compare the base voltages of the other two transistors with green drive base voltage. If there is no base voltage, the fault should be in the matrix section. It is inside an Ic. Philips usually uses TDA series Ics in chroma section. Check the Ic pin voltages according to service manual and try to rectify the fault. It needs a technical knowledge and skill.

 This tv has severe problems in the image processor - you bought a dud. Try getting your money back.

If your picures are all purple it means that the green colour is missing. TV colour is made up by mixing Red, Green & Blue. Removing Green leaving Red & Blue makes purple. Study the green colour circuit for a fault and confirm that the green gun inside the tube is working.

Select RBG setings

CLICK HERE for a PDF copy of your owner's manual.

Page 17 States to change the display color -

Setting the Multicolor Illumination

ILLUMI BLUE (Initial setting) / ILLUMI GREEN/ILLUMI AMBER /
ILLUMI RED

You can change the lighting color of the following four buttons:
SOURCE/POWER, BAND, (left << arrows) and (right >> arrows).

BLUE > GREEN > AMBER > RED > BLUE

• According to the lighting color of the above four buttons, the color
of the other buttons also changes. When the color of the four
buttons is AMBER/RED, the color of the others is AMBER. When
the color of the four buttons is BLUE/GREEN, the others are also
GREEN.

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You have lost red which could be the red driver integrated circuit or associated components or it can be the CRT, you will need to let a technician have a look.
SUPER8

The picture tube of the tv has 3 color in CRT Red, Green, Blue. The red cathodeof tv set has no function, its either the resistor become higt resistance, that why u need a repairman to replace it.

In short If the reds show as red, The greens show as green & Blue shows as blue. I would say thats as good as it can project. It's hard to judge color without seeing it for ones self but usually DLP projectors that use a colorwheel do not have perfect color.

in Monitor CRT Red-Blue-green cathode guns are there.. Mixing of these colour we can get the original colour chrominace technique. if any of the colour gun is faulty we would get more REad or blue or green picture. Measure RGB voltages. you can verfify which gun is faulty. if then check RGB processing circuits. Else there might be problem Chrominance colour decoder system. Contact service centre