How to Tell a Dead Pixel From a Stuck Pixel — and What You Can Do About Each

Two kinds of pixel problems, two very different outcomes

Anyone who has tried to wipe a speck off a screen only to find the mark won't move knows the feeling. According to Engadget, that moment can involve something worse than dirt: a pixel fault. The site notes that display trouble sometimes traces back to a source device or cable rather than the panel itself, which is why ruling out simpler causes comes first.

When the problem really is a pixel, Engadget reports there are two main categories — stuck pixels and dead pixels — and they behave differently enough that telling them apart matters.

Light is the giveaway

The clearest visual distinction, per Engadget, is whether the dot emits anything. A stuck pixel stays permanently lit, showing a constant red, green, blue or otherwise bright point. A dead pixel has stopped working altogether and reads as black. The site notes both can appear as single dots or, less happily, as clusters.

That difference is more than cosmetic. It also hints at whether a fix is possible.

Fixability separates the two

Engadget describes stuck pixels as frequently recoverable. The site says there are numerous troubleshooting paths available, and the problem can often be returned to normal. Dead pixels, by contrast, cannot be salvaged. Engadget's guidance is blunt: replacement or tolerance are the realistic options. The site adds that a dead pixel tends to be a less intrusive visual flaw than something like screen burn-in.

Diagnosing before deciding

Because these faults are tiny, Engadget recommends a process of elimination. Clean the display thoroughly, check whether the spot follows you across different applications, and where possible swap in a different cable and input device. Only after other explanations are excluded does a dedicated pixel test make sense.

Engadget points to tools including Dead Pixel Buddy for detection, along with apps such as JScreenFix and Dead Pixels Test and Fix that the site says also claim repair capabilities. One complication the site flags: stuck pixels tied to power or heat issues may appear only intermittently, in which case the test should be run the moment the problem shows up again.

What this means for buyers and owners

Taken together, Engadget's explanation suggests the practical takeaway is diagnostic rather than preventative. A lit dot offers some hope of recovery through troubleshooting; an unlit one generally does not. Neither fault is described as something a buyer can reliably avoid, and Engadget notes even top-tier monitors are not immune.

For anyone weighing a replacement, the decision may hinge less on brand or price than on which failure they actually have — and on whether the affected area is bothersome enough in daily use to justify the cost. Engadget's reporting does not offer guidance on warranty coverage, manufacturer policies or when a cluster crosses the threshold from annoyance to defect, so those questions remain open.