Color problem one color missing

in this condition if the red color is missing all inputs (like av ,rf, hdmi) then lcd panel is defective and if red color is missing at any in put so please check main board

can I know what is the answer for that question.

Probably one of the red cartridges is empty or near empty or possibly the yellow - it will miss whatever color is low or empty or substitute the next closest shade using the remaining colors if one is out.

I see you don't have much knowledge about printers. It always helps to know something about your printer. It seem you have a color printer. Usually a color printer has two cartridges. Black cartridge and color cartridge. The color cartridge usually contains three colors; cyan, yellow and magenta. If the black cartridge is empty, you won't see black text in the printed paper. Print a small photo and see. If it has all the colors, but looks dull (without proper black color), that means only the black cartridge is empty. If it is greenish, the magenta ink is missing. Generally orange colored printouts suggest cyan is missing. Likewise, purple color means the yellow ink is missing. If you installed the printer properly using the CD from the printer manufacturer, you will be notified when the cartridge is empty or close to run out of ink. But if Windows automatically installed your printer, then the system won't give such information. From the information you have supplied, I believe your blck cartridge is empty or missing. Oh, I almost forgot to say, some manufactures sell some printers (for example some Canon Pixma models) with only the color cartridge. Switch on the printer and open the printer cover. The cartridges will move to the middle. You can check whether the black cartridge is missing. Do not hesitate to contact us for further help.

You may want to remove the power brick at the back of your printer, wait a few seconds and reinsert back. Then try the steps listed in the user guide to install new carts, page 42.

http://www.lexmark.com/publications/pdfs/x5150/eng/ug.pdf

For the KDF55XS955
possibly it could be the connections in back of tv if using the y p b connections, mabey a bad cable or one is unpluged or the signal source.

the color wheel may spin but if you hear noise when it spins it's bad. the jumper is used when replacing one type of color wheel for a nother type. so donot remove jumper unless you've replaced the color wheel and the picture is bad. if the color wheel is good replace the DMD board. if the DMD is not available replace the optical engine.

you need to go to preferences and adjust the new cartridges, aline, clean, etc.

- A bended color pin at the VGA connector. (If pin one is bend then there would be no red color)

- A defective VGA signal cable. If the internal wires were broken then there would be missing colors. You can check if the signal cable is good or bad by doing a continuity test using a multimeter.

- Dry joints in the CRT board such as in the CRT socket pins, video pre amp and driver IC and even at the connector pins. In fact this problem contributed about 80% of Monitor color problems. Applying fresh solder would usually solve the color problem.

- A defective IC either in the Video Pre-amp or Video Driver IC.

- Faulty components in the CRT board. It could be a shorted driver transistor or even electrolytic capacitors that the ESR reading had shot up!

- A bad CRT socket. Sometimes decayed glue could cause the internal pins rusted and thus affecting the colors. Replacing only the CRT socket would definitely solve the problem.

- A weak or a defective picture tube (CRT tube). Yes, I do came across one of the electron gun (most probably the cathode materials had used up) in the tube faulty caused a missing color in the screen. There’s no way to repair this type of problem-the only way is to replace the CRT tube.

- In the newer type of Monitor, color setting is save in the EEPROM IC . Thus, if the EEprom data is corrupted, you would also get a missing color! The only way to repair it is to reprogram the IC or use a soft jig to tune it back the color setting.



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