So what the hell is dead (or defective) pixels? Defective pixels are pixels on a liquid crystal display (LCD) That are not performing as expected. Of Those, never a dead pixel, light shows, and a stuck pixel always shows light (typically red, blue or green), when the device is active. (Wikipedia)
|Dead-pixel(s) on LCD - pictures from Wikipedia|
So how do we check them ?. Instead of buying or installing special software, we can actually make our self-made Dead-Pixels tester tool with Microsoft Powerpoint.
Do the following task :
A. Create a presentation contains 8 slides with background color in RGB + CMYK + White :
- Wait a minute,.. what is RGB and CMYK stands for? okay, here's RGB stands for : RED, GREEN, BLUE and then CMYK stands for CYAN, MAGENTA, YELLOW, BLACK. Furthermore for what is RGB and CMYK, you can read it at Wikipedia at here and here.
- Create a blank presentation with Ms. Powerpoint (I use Ms.Powerpoint 2007)
- On the first slide, right click on the slide, choose Format Background menu
- Select Solid Fill, and select the RED color, and ensure transparency is at the level of 0%.
- Click the Close button
- Repeat the steps above with creating a new slide, and continue with the RGB, CMYK, and White colors on slide background
|8 slides of RGB + CMYK + white|
B. Determine the resolution of your monitor :
- Still in the Powerpoint 2007, on the Design tab, select the Page Setup
- Select the appropriate ratio with typical kind of LCD you use, whether in the form 'square' (ratio 4:3) or Wide-Screen (16:9 ratio)
- Save by pressing the OK button
|Choose 4:3 or 16:9|
C. Save as PowerPoint Show for later use :
- Save type presentation with Powerpoint Show (*. ppsx or *. pps), which later can be directly executed as executable files and without installation.
D. Implementations :
- Clean your LCD screen with an electronic-safe cleaning fluid (I use Mr.Muscle Clear for Electronics from Johnson)
- Run the *. ppsx file that we've just created above.
- In every color, check carefully on your screen if there is black or white dots. If it exists, then the LCD is likely to have dead-pixel.
- Continue checking until the presentation is completed.
- Keep in mind, this methods only to examine the dead-pixel on the LCD, rather than fix it.
|My ThinkPad on scanning|
Hope this article is useful,
And if you're too lazy to make it your own self-made