Coloured Pixels in or around black areas when watching TV

What I believe they are trying to tell you is you need to hook up into a component input . It is a video input only and it has three jacks usually coloured red green and blue. Match up the colours with the receiver and you will get an HD picture. They way you currently have it hooked up is a composite connection with only the yellow being for picture. This cannot get you an HD picture. The red and white is for the sound. I don't know what you mean by he though.

You are correct=====Return it ! It's new, you should not have to have it repaired this soon.

Inside your television are 3 different sets of pixels (red,green,blue) If a pixel goes out or actually stays on there is no way that that can be repaired/replaced. Pixels are considered to be part of the panel of the tv and it is more cost efficient to replace rather than repair. Call your manufacturer immediately. See if you are still in warranty and perhaps they can replace your unit.

replace the optical (light engine assy)

you can try the main board and the control board first (this is the lesser of two evils), if that doesn't do it, it's definitely your sustainer board is bad.

red and green dots on screen

There is no right or wrong setting for the TV, but I find the following give about the best results:

• Contrast - 65 maximum
• Sharpness - 2 maximum

If these are set any higher, the picture becomes very grainy, particularly around defined shapes.

• Contrast + - OFF
• NR - ON (If applicable)

These settings will need to be changed for each of the following:
HDMI 1& 2

• EXT 1, 2 & 3
• Analogue tuner
• Digital tuner

The problem you describe, is usually with a satellite or cable box.

Unfortunately, there's nothing much you can do about the dead pixels, but the settings may make them less obvious.

I have a samsung 42 in plasma television which is three years old, it has a blue flickering light to the right of the television, sometimes can see some at the top in the middle, hope you can help with this problem, is it repairable.

There may be a software glitch. Call Hitachi customer service and ask if your model needs a firmware update to get rid of the sparkles.They also have a website WWW.hitachiserviceusa.com

If it's just one video plug, then perhaps you have to set av5 as being in colour somwhere in the menus.  If you require three wires for the pictures, as blue, green, and red, then make sure they aren't in the wrong ports.
Good luck.