Display · No. 11
Dead Pixel Test
This dead pixel test fills your screen with solid colors so faulty pixels stand out. It is the fastest way to inspect a new monitor, phone, or TV before your return window closes.
Look for dots that stay black, white, or the wrong color, especially near the edges of the screen.
The test includes white, black, red, green, blue, and three gray levels. Clean the screen first so dust is not mistaken for a bad pixel.
How to run the test
The tool cycles through eight solid backgrounds: white, black, red, green, blue, and three gray levels. Each color makes a different kind of fault easier to see, so step through all of them rather than stopping at one.
A faulty pixel usually shows up as a small dot that does not match its surroundings. On a black screen a bright dot stands out, and on a white or colored screen a dark dot is easier to spot. Check the corners and edges carefully, since faults are common there.
A tap or click advances to the next color and the arrow keys move in either direction. The on-screen hint fades on its own so it does not block your view, and Esc exits at any time.
Dead pixels versus stuck pixels
A dead pixel receives no power, so it stays black on every color you show. A stuck pixel keeps one subpixel lit, so it appears as a fixed red, green, blue, white, or colored dot that does not change with the background.
The difference matters because stuck pixels sometimes recover while dead pixels almost never do. A stuck pixel may clear on its own over time, and gentle methods such as rapidly cycling colors or very light pressure through a soft cloth help in some cases, though there is no guarantee.
If you cannot tell which you have, run through every color and watch the suspect dot. A dot that stays black throughout points to a dead pixel, while a dot that glows a color on a black screen points to a stuck pixel.
What to do with a new display
If you find a fault on a new monitor, phone, or TV, act while you can still return or exchange it. Photograph the dot against the color that shows it best so you have a record for the retailer or manufacturer.
Return windows and warranty coverage vary by seller and by brand, and many makers only replace a panel once the number of faulty pixels passes a set threshold. Check the specific return policy and warranty terms for your device rather than assuming, since these rules differ widely.
For an existing display that develops a stuck pixel, it is reasonable to try a pixel refresh routine for a while before seeking a repair. A dead pixel that stays black is a panel level fault and generally needs a service claim if it bothers you.
One faulty dot near the edge is easy to ignore, while a cluster or a fault near the center is far more distracting in daily use. Judge how much it affects real work and video before you decide whether a return, a repair, or living with it is the right call.
Frequently Asked Questions
- What is the difference between a dead pixel and a stuck pixel
- A dead pixel gets no power and stays black on every color. A stuck pixel keeps one subpixel lit, so it shows as a fixed colored dot regardless of the background. Stuck pixels sometimes recover, while dead pixels almost never do.
- Can a stuck pixel fix itself
- Sometimes. A stuck pixel can clear on its own over time, and cycling colors quickly or applying very light pressure through a soft cloth helps in some cases. There is no guarantee, and a truly dead pixel that stays black will not recover this way.
- How do I check a new monitor for dead pixels
- Clean the screen, then run this test and step through every color while inspecting the whole panel, including the corners. Do it soon after unboxing so you can still return or exchange the display if you find a fault during the return window.
- Should I return a monitor with one dead pixel
- That depends on the retailer return policy and the manufacturer warranty, which vary by brand. Many makers only replace a panel once several pixels are faulty, so check the exact terms for your device. If you are still inside a no questions return window, exchanging it is often the simplest option.
- Does the dead pixel test work on phones and TVs
- Yes. Any screen that can open this page in a browser can run the test, including phones, tablets, laptops, and many smart TVs. Tap or use the on-screen controls to move through the colors and inspect the display.
- Why do I see specks that are not dead pixels
- Dust, smudges, and lint on the surface can look like faulty pixels. Clean the screen with a soft dry cloth first and look again. A real pixel fault sits under the glass and does not wipe away or move when you clean.