1. First of all, Apple instructs the technician to set the screen to display one color at a time from the following colors: all-white display, all-red display, all-green or all-blue display. Techs have a diagnostic utility that will generate these colors, but you can download Pixel Check for the Mac to test your display yourself.

2. Using a jeweler’s loupe, pocket microscope, or other magnifying device, identify and count each pixel anomaly.

• Bright subpixel anomaly = subpixel that is always on

• Dark subpixel anomaly = subpixel that is always off

3. If the number of subpixel anomalies exceeds the acceptable number listed below, Apple will replace the display assembly.

Acceptable Number of Subpixel Anomalies

• Bright: Up to 3

• Dark: Up to 5

• Combination: Up to 7

Replace Display

• Bright: 4 or more

• Dark: 6 or more

• Combination: 8 or more

Apple tells customers that a certain number of subpixel anomalies are considered acceptable, and these factors apply to all manufacturers using LCD technology — not just Apple products.

If you have one or two dead pixels, you can try and rejuvenating them by doing the following:

1, Now, get a soft washcloth.

2. Fold it over a few times.

3. Turn off your computer.

4. Apply pressure to the affected pixel area. Don’t press too hard!

5. Turn on your computer. Hopefully the pixel will work again. If it doesn't, try massaging the areas around the pixel as well. Many have reported good results with these two methods. Just make sure not to use too much force.

If you have pixels that are simply stuck, try using this JScreenFix applet. The JScreenFix Java applet helps fix stuck pixels and image persistence on LCD screens and reduces burn-in on plasma screens. The applet runs safely inside a web browser, does not require installation and works with Windows, Linux and Mac computers.