If you have bought a TFT monitor you might want to consider using a software like Dead Pixel Tester to see if it has any dead pixels. This could for instance be useful to see if it is possible to get the current monitor replaced by a new one because of to many dead pixels.
Most monitor manufacturers have a policy of replacing TFT monitors if they have a certain amount of dead pixels. The software Dead Pixel Tester is able to identify dead pixels by filling the monitor with straight colors. If a pixel is not able to display that color it will display a different one which means that you just discovered a dead pixel.
Using Dead Pixel Tester is not complicated at all. After downloading the application start it. Please note that it does not need to be installed which is always nice. A menu will appear that makes it possible to configure some settings but this is not necessary at all.
If you left-click your mouse on your screen you will notice that it will change color. A right-click will hide the menu so that you can inspect the full screen to see if there are any dead pixels on the screen.
If you spot none you can cycle through all colors to see if a dead or stuck pixel appears when the screen is shown in a different color. You could try to fix a dead or stuck pixel by launching the pixel exerciser and moving its window over the area of the dead pixel but the author himself is not so sure if this is working at all.
Ask the manufacturer of the monitor about their replacement policy to know if they replace the monitor if you found some dead or stuck pixels.
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