You found one dot that won’t match the rest of the screen. Before you try to save it or box the monitor back up, work out which fault you’re looking at. A stuck pixel and a dead pixel are two different problems: one glows, one stays black, and only one of them has any shot at coming back.
Stuck or dead: the two-second version
Pull up a solid black screen, then a solid white one. A stuck pixel gives itself away on black, glowing red, green, or blue while everything around it stays dark. A dead pixel does the reverse. The dot sits as a black speck on the white fill, then vanishes into the black one. That single flip sorts most cases before you do anything else.
Stuck
Glows one color on a black screen. Still powered, so it is fixable.
Dead
Stays black on every color. Draws no power, so it will not come back.
Why one comes back and the other doesn’t
Every pixel is built from three subpixels, one red, one green, one blue, each driven by its own tiny transistor. A stuck pixel still gets power. One of its subpixels is locked on a value and won’t switch with the image, so the dot freezes on a color. Because the cell is still live, flooding it with fast color changes can jolt that transistor back into switching. That is a real chance at recovery, though never a promise.
A dead pixel gets no power at all. Its transistor has failed. All three subpixels stay off, so the dot reads black on every color you throw at it. Nothing you run on the screen can reach a circuit that isn’t there. That’s why a dead pixel almost never recovers.
The third case: a hot pixel
One rarer fault sits between the two. A hot pixel is the opposite of a dead one: all three subpixels fire at once and lock on, so the dot burns bright white against a dark screen. It still draws power, which puts it closer to a stuck pixel than a dead one, though it clears less often. If a dot glows white on black instead of red, green, or blue, it’s hot, not stuck.
What each one means for you
Name the fault first. That decides whether you spend the next hour running a fix or filing a warranty claim instead.
A stuck pixel earns the first try. Open the stuck pixel fixer, drag its box of fast color noise over the spot, and let it run. Most pixels that recover do so within half an hour, and a freshly stuck one comes loose easier than one frozen for months. A stuck red tends to free up sooner than a stubborn blue.
The color noise box parks on a stuck pixel and drives its subpixel through every value many times a second until it breaks loose.
A dead pixel is a warranty conversation, not a repair. No color routine revives a cell with no power, so your effort goes into the return instead. Makers don’t promise a flawless panel. Most follow ISO 9241-307, which sorts displays into defect classes by how many bad pixels they’re allowed to ship. The common Class II permits, per million pixels, two always-on bright dots, two dead black ones, and up to five stuck subpixels before the panel qualifies as defective. Some premium screens carry a zero bright dot guarantee that covers even one. Your warranty lists the exact count it honors, so read it, then test a new screen the day it arrives while you can still send it back. A screenshot won’t save the fault either, since it captures the clean framebuffer and never the broken dot, so photograph the spot with a second phone if you need proof.
Not sure a dot is even a defect yet? Run the dead pixel test full screen first. It cycles every fill color so you can rule out dust or a bad cable before you file anything. Got a confirmed stuck pixel? The step-by-step fix guide covers how long to run the noise pattern and when to stop trying.