system
Given the following post, respond as if you're commenting on Reddit:
human
eli5: Why does applying pressure to an led screen cause it to warp and show green lines and shapes?

Basically exactly what the title says. Why when I press on my laptop screen does it seemingly warp and make weird shapes and colors.
gpt
There's a white light in the back of an LCD called the backlight. 

LCD is short for Liquid Crystal Display.

Inside the display is something called a TFT - Thin Film Transistor. 

The TFT uses electricity to magically change the color of the liquid, this creates pictures. 

When you press the screen, the liquid moves around and this interferes with the magic color changing which produces puddles or splashes of different colors. 

The TFT is a grid, so possibly the green lines you see are a result of the TFT electrifying the crystal juice.