Your red dot is a red subpixel thats stuck on, keeping the red liquid crystal activated and therefore turning white light red even when it shouldnt.LCD screens are made up of thousands of pixels, each of which is made of three liquid-crystal subpixelsone red, one green, and one blue.
There are two things you can do to nudge your stuck pixel back to its proper behavior.
The first is making the screen quickly flash a series of solid colors.
This reenergizes the stuck pixel, whose transistor power supply has been disrupted.
We recommend using JScreenfix, a Java applet that runs for about 20 minutes, toggling color changes onscreen. If software doesnt do the trick, you can try physically massaging the pixel away.
But be careful; being too rough with any screen can make the problem even worse.
Turn off the monitor and apply pressure on the problem area with a damp rag, dislodging the stuck liquid by removing the tiny flexes in the screen that might have prevented circuits from bonding.Then turn the screen back on; the stuck pixel should be gone. It won’t bring completely dead black pixels back to life, but it should work if they’re just stuck on a particular color. To repair the stuck pixels, run from the downloaded files and then run the video file most suitable to your device. Well, Pixel Repair is a freeware dead stuck pixel fixer that can help you test, detect and fix stuck and dead pixels of your Windows computer screen. A dead pixel is simply dead, and is mostly black in color. If you aren’t able to find the dead pixels, you must look into the examples below the Dead Pixel Locater.The program does not guarantees 100% efficiency, it may also not work sometimes and remember you cannot fix the dead pixels instead you can fix only the pixels which are stuck to a particular color. Next comes the Color Mode, under this mode you can flash different colors on computer display and look for any errors, you can choose from different set of colors and you can even choose the speed of the flashing colors. To start with, the program lets you detect the stuck pixels by a manual screen test, you can click any color from the Dead Pixel Locater and the color will be displayed on the entire screen and then you will have to manually look for any dead or stuck pixels, you can change background colors by using the arrow keys from your keyboard and once you are done with locating those dead pixels you can press escape to return back to Pixel Repair.