Dead Pixel Test for TVs: How to Check Your Samsung, LG, or Sony

You just noticed something on your TV screen. A tiny dot that will not disappear no matter how many times you clean the glass.

It could be dust. Or it could be a dead pixel.

Dead pixels on a TV are especially frustrating. Your 55- or 65-inch screen is supposed to be the centerpiece of your living room — the last thing you want is a speck ruining every movie night. The good news is that testing takes less than five minutes, and you can do it right now without downloading anything.

Can TVs Get Dead Pixels?

Absolutely. A modern TV is essentially a giant monitor. The same technology that makes computer screens vulnerable to pixel defects applies to televisions.

A typical 4K TV has over 8 million pixels. Each pixel contains three sub-pixels — red, green, and blue — that blend together to create every color you see. If any of those microscopic components fail, you get a visible defect on screen.

Pixel defects can appear right out of the box due to manufacturing errors, or develop later from physical impact or pressure. On OLED TVs, pixel wear can also occur over years of use.

Dead Pixels vs. Stuck Pixels on TVs

Before you test, it helps to know what you are looking for. There are two types of pixel defects.

Dead pixel: A tiny black dot visible on bright or white scenes. The pixel is completely off — it receives no power and produces no light. Dead pixels are almost always permanent.

Stuck pixel: A tiny colored dot (red, green, or blue) that shows up on dark scenes. The pixel is frozen "on" in a single color. Stuck pixels can sometimes be fixed.

Not sure which one you have? Our guide on Dead Pixel vs. Stuck Pixel walks through the differences and what you can realistically do about each type.

How to Test Your TV for Dead Pixels

Here is the full process. It works on any TV brand — Samsung, LG, Sony, TCL, Hisense, or anything else.

Step 1: Clean the Screen First

Use a dry microfiber cloth to gently wipe the entire screen surface before you start. Dust, smudges, and fingerprints can look remarkably like pixel defects on a solid color background. Eliminate those false positives first.

Step 2: Open the Dead Pixel Test

You have two options depending on your setup:

Option A — TV's built-in browser: Most smart TVs have a built-in web browser. Samsung (Tizen), LG (webOS), and Sony (Google TV) all include one. Open it and navigate to DeadPixelCheck.com. This gives you the most accurate full-screen test directly on your TV.

Option B — Laptop via HDMI: Connect your laptop to the TV using an HDMI cable. Set the laptop to extend or mirror to the TV display. Open DeadPixelCheck.com, drag the browser window to the TV screen, and go fullscreen with F11.

Step 3: Run the White Test

Select the white color to fill your screen completely. Step back and slowly scan the entire panel surface. Look for any tiny black or dark dots that do not belong. These are potential dead pixels.

Take your time. On a large TV, a single dead pixel is small relative to the screen size. Work your eyes across the screen in rows, like you are mowing a lawn.

Step 4: Run the Black Test

Switch to the black background. Now look for any bright colored dots — red, green, or blue spots glowing against the dark screen. These are stuck pixels.

This test is especially revealing on OLED TVs, which produce true black with no backlight. A stuck pixel on an OLED panel glows like a tiny star in a dark sky. It is hard to miss.

Step 5: Test the Remaining Colors

Cycle through red, green, and blue. Some sub-pixel defects only show up on specific color backgrounds. A faulty blue sub-pixel might be invisible on a red screen but obvious on a white or blue one.

Use Auto Cycle mode to flip through all colors automatically if you want a thorough sweep without clicking each one manually.

What to Do If You Find a Dead Pixel

If it is stuck (a colored dot): Run Auto Cycle mode on our tool for 15 to 30 minutes. The rapid color changes can sometimes unstick a frozen pixel by forcing it to cycle through power states. This works more reliably on LCD TVs than on OLEDs.

If it is dead (a black dot): True dead pixels on TVs do not self-heal. Your options are:

• Retail return: If you just bought the TV, return it immediately. Most retailers — Best Buy, Amazon, Costco — accept returns within 15 to 30 days with no questions asked. This is almost always your easiest path.
• Manufacturer warranty claim: Most brands cover dead pixel defects, but many have minimum threshold policies (see below). Keep your purchase receipt and original packaging.
• Professional repair: TV screen repairs are expensive — often approaching the cost of a new TV. For a single small pixel, most people choose to live with it rather than pay for a panel replacement.

OLED vs. LCD TVs: How Dead Pixels Differ

The panel type in your TV affects how dead pixels look — and how fixable they are.

LCD TVs (most Samsung, TCL, and Hisense models) use a backlight that shines through a liquid crystal layer. Dead pixels appear black because that layer is blocking the light. Stuck pixels appear as colored dots. Gentle pressure sometimes helps stuck pixels on LCD panels.

OLED TVs (LG OLED, Sony Bravia XR OLED) have self-emitting pixels — no backlight needed. Each pixel makes its own light. A dead OLED pixel appears as a perfectly black spot because it simply stopped producing light. Stuck pixels on OLEDs are very bright, single-color dots.

TV Brand Warranty Policies for Dead Pixels

Most TV manufacturers require a minimum number of pixel defects before they will authorize a warranty repair or replacement. A single isolated dead pixel in the corner may not qualify.

Samsung: Covers dead pixel defects under warranty, but uses a threshold based on the ISO 13406-2 standard. Premium models (QLED, NEO QLED) often have more consumer-friendly policies. Contact Samsung support with photos of the defect.

LG: Similar threshold approach. LG OLED TVs can be particularly strict since OLED pixel failures are more complex and costly to repair. LG's Zero Bright Dot policy applies to select premium OLED models.

Sony: Bravia premium models generally have better pixel defect coverage. Sony evaluates claims on a case-by-case basis. Document the defect clearly with photos before calling.

For the full breakdown of dead pixel policies — and how to navigate a warranty claim — read our Dead Pixel Warranty Guide.

Related Guides

• Dead Pixel vs. Stuck Pixel: Know the Difference — Identify exactly what type of defect you have.
• Dead Pixel Warranty Guide — How to file a claim with Samsung, LG, Sony, and retailers.
• Dead Pixel Test for Phone — Check your iPhone or Android screen using the same method.