This plan covers:
A dead pixel is a pixel on a digital display that is not functioning properly. Unlike "stuck" or "hot" pixels, which might still emit light but are stuck on a single color or display incorrect colors, a dead pixel is usually characterized by a small dot on the screen that remains black or unlit because it is not active at all.
Pixels are the smallest units on a display screen that combine to form images. Each pixel typically consists of three subpixels (red, green, and blue) in LCD displays. When all subpixels are off, the pixel appears black (dead), when all are on, the pixel appears white, and combinations of different intensities of subpixels create the full range of colors you see on the screen.
Fixing dead pixels can be challenging, and there's no guaranteed method for success, but here are some approaches you can try:
Remember that there's a risk of damaging the screen further with the pressure and heat methods, so they should be performed carefully. It's also important to note that if there are a lot of dead pixels, it might be a sign of a faulty screen, and a replacement might be the better option.