Dead Pixel vs Stuck Pixel: The Difference and What You Can Do
⚡ Quick Answer
A dead pixel stays black on every background because it receives no power; a stuck pixel glows one fixed colour — usually red, green or blue — because one of its subpixels is jammed on. Find either by displaying fullscreen solid-colour panels and inspecting from arm's length. Stuck pixels sometimes recover with pixel-flashing software or very gentle massage; dead pixels almost never do. Wipe the screen first — most "dead pixels" turn out to be dust.
That Tiny Dot That Will Not Go Away
Once you have noticed it, you cannot unsee it: a single dot on your screen that ignores whatever is displayed around it. Before deciding what to do about it, you need to know which of three faults you are looking at — because one of them can sometimes be fixed at home, one cannot, and one is not a fault at all.
The fastest way to tell is a fullscreen display test: cycling solid black, white, red, green and blue panels makes each type of defect show itself in a way normal desktop wallpaper never will.
What a Pixel Actually Is
Every pixel on an LCD or OLED panel is really three light valves sitting side by side: a red, a green and a blue subpixel. Your screen mixes colours by varying how brightly each of the three shines — all three at full power looks white, all three off looks black, and everything else is a blend. A 1080p panel has over two million pixels, which means more than six million subpixels, each with its own microscopic transistor. With numbers like that, the occasional failure is a manufacturing reality rather than a freak event.
What fails, and how it fails, determines what you see:
Dead pixel. The pixel receives no power at all — typically a failed transistor — so all three subpixels stay off. It appears as a black dot on every colour except black, where it hides. Because the circuit is physically broken, no software trick can revive it.
Stuck pixel. One or more subpixels are jammed in the "on" state while the rest behave. You see a persistent red, green or blue dot (or cyan, magenta or yellow if two subpixels are stuck) that is most obvious on a black background. The transistor is misbehaving rather than destroyed, which is why stuck pixels occasionally recover.
Hot pixel. All three subpixels are stuck on together, producing a dot that glows white on every background and vanishes only on a white screen. Functionally it is a stuck pixel with all three channels affected, and manufacturers' pixel policies usually treat "bright" defects like this as the most serious kind.
How to Find Them With Fullscreen Colour Panels
You cannot diagnose a pixel defect against a busy desktop. You need solid, fullscreen colours, and you need to check every colour, because each panel reveals a different defect.
- Clean the screen first. Power the display off and wipe it gently with a dry microfibre cloth. A speck of dust or a tiny mark on the coating is by far the most common "dead pixel", and it is the only kind that comes off with a cloth. If the dot moves or vanishes, you are done.
- Open the screen test and go fullscreen. The TestMyPC screen and display test shows solid black, white, red, green and blue panels with the browser chrome hidden. Reset browser zoom to 100% first, and set brightness to a normal working level.
- Inspect from about arm's length. Close enough to see a single pixel, far enough that you scan systematically rather than nose-to-glass. Sweep the panel in rows, the way you would proofread a page.
- Cycle every colour. A dead pixel shows as black on white, red, green and blue. A stuck red subpixel shows as a red dot on black and as a wrong-coloured dot on green and blue — but looks normal on red. That is why a single colour is never enough.
- Note the location. If you find something, note roughly where it sits (say, "upper-left quadrant, about a quarter in"). You will want this for a warranty claim, and for checking whether it changes over time.
The whole inspection takes about five minutes, and a browser can display the panels on any laptop, monitor or TV with a browser — though it cannot automatically scan the physical pixels for you; your eyes do the detecting.
Free Tool
🔍 Check Your Screen Now
Fullscreen colour panels, gradients and grids — find pixel defects in five minutes.
Open Screen Test →| Defect | What you see | Best panel to spot it | Fixable? |
|---|---|---|---|
| Dust or debris | Dark speck, slightly raised or irregular | White | Yes — wipe with a cloth |
| Dead pixel | Black dot on every colour | White | Realistically no |
| Stuck pixel | Fixed red, green or blue dot | Black | Sometimes |
| Hot pixel | White dot on every colour | Black | Rarely; strongest warranty case |
Fixing a Stuck Pixel: Honest Odds
Because a stuck subpixel's transistor is misfiring rather than broken, there are two home remedies with a genuine — if modest — success rate. Neither is guaranteed, and plenty of stuck pixels simply stay stuck. Treat anyone promising a fix with suspicion.
Pixel flashing. Software that rapidly cycles colours over the stuck pixel for anywhere from ten minutes to a few hours, trying to jolt the subpixel's transistor back into responding. It is harmless to try, occasionally works, and works best on recently stuck pixels. Some stuck pixels also recover on their own over days or weeks of normal use — worth knowing before you escalate.
Gentle massage. With the screen off, press very lightly on the stuck pixel through a soft microfibre cloth with a blunt, rounded object (a stylus cap, not a fingertip's nail), then power on while releasing. The theory is that gentle pressure redistributes the liquid crystal. The warnings matter more than the technique: press lightly — screens are laminated glass over fragile layers, and firm pressure can create the very defect you are trying to cure, or worse, a pressure mark. Never try this on an OLED, and if you are inside a warranty period, do not try it at all: physical damage from a DIY fix can void a claim that the stuck pixel alone would have won.
Dead pixels: no home fix. A dead pixel is a broken circuit. Flashing tools and massage do nothing, because there is no signal reaching the pixel to influence. Your options are acceptance, warranty, or — on a monitor — living with it until the next upgrade. On the plus side, a single dead pixel is invisible during most real use; it is dust-checks and white documents that reveal it.
👤 Example scenario
You unbox a new 27-inch monitor, run a fullscreen colour sweep, and find a single green dot glaring on the black panel. Ten minutes of research shows the manufacturer's policy replaces panels with any bright pixel defect in the first year. A photo of the dot on the black test panel, a short support ticket quoting the policy, and a replacement arrives within the week — a far better outcome than a speculative evening of pixel massage.
Pixel Policies: When the Manufacturer Owes You a Panel
Here is the part that surprises people: most manufacturers do not treat one dead pixel as a defect. Panel makers work to the ISO 9241-307 standard, which grades panels into classes — and the common consumer grade, Class I, tolerates a small number of defective pixels per million before a panel counts as faulty. In practice, policies vary widely by brand and product tier:
Premium monitor lines increasingly advertise zero-bright-pixel guarantees — a single stuck or hot pixel qualifies for replacement, often within the first year. Mainstream policies typically require something like three to five defects, or two within a small area, before honouring a claim, and dead (dark) pixels are usually tolerated in greater numbers than bright ones, because a glowing dot is more visible than a black one. Laptop panels tend to have the least generous policies of all.
So before you argue with support: find your exact model's pixel policy, count your defects on each fullscreen colour, photograph them (a black panel for bright defects, white for dark ones), and quote the policy back in your claim. If you bought recently, remember that a retailer's change-of-mind or DOA return window may be far more generous than the manufacturer's pixel policy — which is one good reason to run this check within days of purchase, not months. Buying second-hand? Make the pixel sweep part of your inspection alongside the rest of a used laptop checkup, because there is no policy to fall back on once cash has changed hands.