LCD flat panels have many advantages, such as a smaller footprint and reduced power consumption compared to older cathode ray tube screens. Unlike the latter, a flat screen is composed of hundreds of thousands of pixels. The problem is that some of these pixels may be defective: they no longer display any color or get stuck on a primary color: red, green or blue. They say that they are dead.
So when you buy an LCD or a laptop, it is important to verify that all pixels are working well and no pixel is defective. In this case, you can then play the warranty of your screen to exchange it against a screen without dead pixels.
UDPixel is a free software so you can verify that your monitor has no defective pixels. For this, it will display successively united colors on the screen. You will then see in a glance who do not respond or show poor color. Note that if you detect a dead pixel, UDPixel will allow you to try to repair it by stimulating it with a very rapid change of color. The result is not assured, but you have nothing to lose by trying.
Download and install UDPixel:
- UDPixel is a small free utility that you can download from here.
- Save the file to your hard drive.
- Once the download is complete, run the downloaded file by clicking the Run button.
- Confirm the launch of the installation wizard UDPixel clicking Run.
- Click the Next button.
- Click the Install button.
- Then click the Close button.
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