More often than not, those dots are dead pixels, also called dark pixels ... If your device doesn't have or support any ...

But it's still a pretty annoying inconvenience to see a dead pixel that stays the same color no matter what's happening on the screen. This is especially the case when dead pixels appear on the ...

There may come a time when you feel the need to test whether the LCD display on your computer monitor is working fine. You may believe that the little dot is a dead pixel, so how do you make sure?