Only color is yellow and blue

The symptoms you are describing with your Samsung plasma TV are consistent with a failure of the plasma display panel or a failure of the plasma drivers that control the display Here are a few things you can try to troubleshoot the issue:

1. Check the connections: Make sure all the cables and connections to the TV are secure and not damaged. Loose or damaged cables can cause visual distortions on the screen.
2. Perform a factory reset: Sometimes a factory reset can fix issues with the TV. Refer to the TV manual for instructions on how to perform a factory reset.
3. Check the internal components: If you have experience working with electronics, you can try opening the TV and checking for any obvious damage or loose components. However, be aware that opening a TV can be dangerous and may void the warranty.

AJUST VS VSC VOLTAGES

If you need a manual, you can use this link to get one.
http://www.retrevo.com/support/Hitachi-43UWX10B-TVs-manual/id/371dj799/t/2/

I have a 21'' NEC TV Screen and it about 3 year old. the colour has gone to yellow and green color and the red etc

Are you trying to plug in the yellow, red ,and white cables into blue, green, and red slots? If you are you cannot because those are for HD inputs only

what type of t.v is it.

Let me know, and i can help but to me it sounds like a busted Processor, but dont listen to me untill i know what your viewing candy is

LCD, PLASMA, OLED, DLP, LP, CRT what type of t.v do you have?

if it is hooked up with componant, thats the red blue green cables for video, and red white for audio, then you probabily eather dont have the red pluged all the way in, or you have the red audio, and red video---reversed, make sure to check them on the dvd player, and on the tv, if there correct, try using the composit input, that is the yellow red and white

What component(s) are you connected to this TV?And what type of A/V cables are you using?
Does it only happen when you watch cable or directv or dishnetwork?
solutiondoct

You might want to check the component cables to make shure they are firmly seated.

Blue should converge on top of "yellow".Bad connection(s)

on blue convergence IC.Replace both IC's for durable repair.

Check pico fuses.Reset convergence alignment.