What is a dead pixel, and what is a stuck pixel?
Locate one point. Compare it with the cursor moved away and the page controls hidden by fullscreen. The question what is a dead pixel cannot be settled by a label alone; you need a repeated dark-point observation on light fields before seeking a physical explanation.
Could it be a surface mark? Inspect without pressing the panel and use only the manufacturer's cleaning instructions. Reflections, dust and residue can resemble small defects. Record whether the appearance changes with viewing position before assuming that the electronics underneath have failed.
Keep zoom and viewing conditions fixed. A browser pattern passes through system scaling and colour processing, so it cannot address or certify every physical subpixel. Fullscreen makes the field easier to inspect but does not remove those processing layers or turn a visual check into an electrical measurement.
Run the colour sweep
Start with white. Note a dark location and mark where you saw it. The browser stores a local coordinate for reference; that mark is not an automatic detection result. Move the pointer away and inspect the point again so the marker itself does not become the suspected defect.
Then inspect black. Note any bright or coloured point separately, keeping room light and brightness unchanged. Does it stay in the same place when the background changes? That repeated position helps organise the record, but cannot establish the internal cause or whether the point can recover.
Compare red, green and blue. Record on which fields the point remains visible and whether its apparent colour changes. Use the same location rather than comparing several nearby specks from memory. The dead pixel vs stuck pixel task is a description of those differences, not a promise that one sweep produces a final diagnosis.
Dead pixel vs stuck pixel: read the result
A point that remains dark on white and coloured backgrounds is consistent with a dark-pixel symptom. Describe the observed fields before calling it dead. The browser cannot inspect power, transistor operation or panel wiring, so its pattern cannot determine which internal part stopped responding.
A bright or coloured point on a black field is a different symptom. It may involve a pixel or subpixel that stays lit, but a browser cannot resolve every tiny fragment without an appropriate physical inspection. Record the colour and affected fields rather than claiming that a working transistor has been proven.
If the point differs on one primary colour only, keep that detail in the support record. Pixel policies may distinguish bright pixels, dark pixels and subpixels, with different rules for different models. Do not turn an observed colour into a universal replacement threshold or assume one brand's policy covers another.
Limits of a browser pixel check
The test displays page colours. It cannot measure the physical panel's voltage, electrical state or calibrated luminance. A screenshot captures the rendered page and may omit a physical defect entirely, while a photograph depends on focus, exposure and angle. Keep visual notes with the images.
A browser pixel refresher is not the display's own maintenance routine. Rapid colours do not call firmware compensation, and this guide does not prescribe a cycling duration or predict a recovery rate. Check the manufacturer's current instructions before trying any maintenance beyond ordinary viewing.
Do not press or massage a suspect point. A browser cannot verify that such a method is appropriate for your model or that it will avoid damage. If the display's support guidance discourages software cycling, follow it instead of treating an online pattern as an approved repair.
Fix it, cycle it or claim it
Record the location, visible fields, model and date before choosing a next step. If the point affects normal use, contact the seller or manufacturer with that record. A repeatable sample helps explain the symptom but does not establish warranty eligibility or which service action is required.
For a laptop, continue with the laptop dead pixel repair guide to separate inspection from service options. For a wider display check, use the monitor guide. Keep these tasks separate rather than repeatedly running colours in search of a pass label.
Read the current model-specific pixel policy and return terms. Check whether the rule counts bright points, dark points or subpixels, and what evidence support requests. If the result remains uncertain, say so directly. No browser observation justifies inventing a recovery chance or a guaranteed replacement outcome.
Symptom table
| Symptom | Likely layer | Next action |
|---|---|---|
| Dark point on light fields | A repeated dark-point observation needs classification | Compare the same point on the screen test |
| Bright point on black | A bright pixel or subpixel symptom needs review | Record the colour and check model-specific support |
| A larger patch, cluster or line | The browser cannot establish the physical cause | Record separate observations; use the line guide for a full row or column |
| A mark that moves or wipes away | Dust, residue or an app overlay may resemble a pixel | Compare another app and follow the maker's cleaning guidance without pressing the panel |
Common questions
What is the difference between a dead and a stuck pixel?
A dark point on light fields and a bright or coloured point on black describe different pixel symptoms. Compare the same location across colours before naming it. The page cannot inspect panel electronics, prove permanence or determine whether repair will work. Keep the observation and the service decision separate.
Can a stuck pixel fix itself?
A visible point may change over time, but this page cannot predict recovery or provide a success rate. Do not prescribe prolonged cycling from one observation. Record the symptom and follow the exact model's maintenance and support instructions, including any guidance against unsupported pixel-fixing software.
Should I press on a stuck pixel to fix it?
Do not press or massage it as a browser-guided repair. The page cannot verify the method or the condition of the panel. Check the manufacturer's instructions and contact support with a repeated colour record. A controlled field is an inspection tool, not permission to apply force to the screen.
What is a dead pixel?
A dead pixel is commonly used to describe a point that remains dark on light or coloured backgrounds. A browser can help record that appearance but cannot inspect the underlying electrical failure. Compare the same location on several fields and use the manufacturer's classification for service decisions.