Samsung Screen Test

What is a Samsung Screen Test?

A Samsung screen test is a diagnostic procedure that displays solid colors on your Galaxy display to reveal defective pixels. A dead pixel appears as a tiny black dot that never lights up, while a stuck pixel stays on a single color. On AMOLED Galaxies, the test also reveals burn-in — permanent ghost images caused by uneven pixel aging.

Our free online Samsung screen test cycles through pure white, black, red, green, and blue screens in fullscreen mode. It works on Galaxy S, A, Z Fold, Z Flip, Note, and Tab — in Chrome or Samsung Internet, with no downloads or signups.

Why Samsung Screen Testing Matters

Samsung is the world's largest manufacturer of AMOLED displays — their Galaxy phones feature some of the best screens on the market. But they're also prone to burn-in and dead pixels. Here's why testing matters:

• Expensive to replace — AMOLED screen repairs cost $200–$400+
• Samsung warranty limits — Samsung won't replace for 1–2 dead pixels
• AMOLED burn-in risk — Higher than LCD or iPhone OLEDs
• Used Galaxy purchases — Always test a used Samsung before buying
• Documentation — Test results help with warranty claims

How the Samsung Screen Test Works

Our test uses the same industry-standard test patterns trusted by display manufacturers and calibration professionals. It cycles through:

• Pure white — Reveals dead pixels (black dots) and dust
• Pure black — Reveals stuck pixels (bright dots) and uniformity issues
• Red, green, blue — Reveals sub-pixel defects and color anomalies
• Grey (50%) — Reveals burn-in and image retention on AMOLED

💡 Pro tip: Before testing, set your Galaxy brightness to maximum (Quick Settings → Brightness slider) and disable Adaptive Brightness and Eye Comfort Shield for the most accurate results.

What Does This Test Detect?

Our Samsung screen test is designed to detect six distinct types of screen defects. Here is exactly what you should look for:

1. Dead Pixels (Black Dots)

A dead pixel is a pixel that has completely stopped working. It appears as a tiny black dot that stays black on every background — including a full white screen. Dead pixels are permanent hardware failures and cannot be fixed.

2. Stuck Pixels (Bright Colored Dots)

A stuck pixel remains on a single color — red, green, blue, or white. Unlike dead pixels, stuck pixels still receive power, which means they can often be fixed using rapid color cycling or gentle pressure.

3. Partially Stuck Sub-Pixels

Each pixel contains three sub-pixels (red, green, blue). Sometimes only one or two sub-pixels fail, creating colors like cyan, magenta, yellow, or dimly colored dots. These are harder to spot but still detectable with our test.

4. AMOLED Burn-In (Most Common Issue)

Samsung Galaxy phones with AMOLED displays are especially prone to burn-in — permanent ghost images from static content like the status bar, navigation buttons, or Always-On Display. Our grey test pattern reveals burn-in clearly.

5. Image Retention (Temporary Ghosting)

Unlike true burn-in, image retention is temporary. It fades after a few minutes or hours of normal use. Our test helps distinguish between the two — a critical difference for warranty claims.

6. Uniformity Issues (Clouding & Color Shift)

Our solid-color screens reveal clouding (blotchy patches) and color tinting (yellow, blue, or pink areas). These issues are common on older Galaxy phones or after drops.

💡 Pro tip: Test in a dark room with your Galaxy at maximum brightness and Eye Comfort Shield disabled. This makes subtle defects much easier to spot.

What the Results Mean: A Complete Interpretation Guide

You've run the test. Now you see something on your Galaxy screen. But what exactly is it, and how serious is it? Here's how to interpret what you found:

How to Confirm What You Have

The easiest way to confirm the nature of the defect is to check the dot on every color:

• Stays black on ALL colors → Dead pixel
• Disappears on ONE specific color → Stuck pixel (that color's sub-pixel is stuck ON)
• Bright on dark backgrounds only → Likely a stuck white pixel
• Ghost image fades after 1 hour off → Image retention, not burn-in
• Ghost image persists after 1 hour off → True burn-in (AMOLED)

What to Do Next Based on Your Result

• Dead pixel → Return within return window (14-30 days) or contact Samsung
• Stuck pixel → Try our 5 proven fix methods
• Burn-in → Check Samsung warranty — burn-in is covered on newer models
• Clouding or color shift → Return within window if severe
• Ghosting → Not fixable — inherent to the display technology

💡 Important: If you see multiple defects, take clear photos of each one. Samsung usually requires documented evidence for warranty claims — especially for burn-in.

Common Samsung Screen Problems (And How to Fix Them)

After testing thousands of Galaxy phones, we've identified the most common issues users face. Here are the top 6 problems — and exactly how to solve them:

Problem 1: One or More Dead Pixels

Symptom: Black dots that never light up, visible on every color.

Cause: Hardware failure (transistor burned out).

Solution: Dead pixels cannot be fixed. Return the Galaxy within the return window, or file a Samsung warranty claim if you have coverage.

Problem 2: Stuck Pixels (Bright Colored Dots)

Symptom: Bright red, green, blue, or white dots that stay on one color.

Cause: Liquid crystals frozen in one position.

Solution: Try our 5 proven fix methods — software cycling, gentle pressure, tapping, heat, or waiting it out.

Problem 3: AMOLED Burn-In

Symptom: Ghost image of the status bar, keyboard, or navigation elements visible on grey backgrounds.

Cause: AMOLED pixels age unevenly when static content is displayed for long periods.

Solution: Reduce brightness, enable auto-brightness, use dark mode, and avoid long periods of static content. Samsung covers burn-in under warranty on newer models — check your coverage.

Problem 4: Image Retention (Temporary Ghosting)

Symptom: Faint ghost image that fades after a few minutes or hours.

Cause: Temporary pixel fatigue, not permanent damage.

Solution: Turn off your Galaxy for an hour and check again. If it fades, it's image retention — no action needed.

Problem 5: Color Tinting

Symptom: Yellow, blue, or pink tint visible across the screen.

Cause: Eye Comfort Shield, Vivid vs Natural mode, or panel damage.

Solution: First, disable Eye Comfort Shield in Settings → Display. Check your Screen Mode (Vivid vs Natural). If the tint persists, it's a panel issue — contact Samsung.

Problem 6: Ghosting & Motion Blur

Symptom: Trailing blur behind moving objects.

Cause: Slow AMOLED response time (rare on modern Galaxy phones).

Solution: This is inherent to the panel technology — not fixable. Contact Samsung if it's severe and under warranty.

💡 Pro tip: Before contacting Samsung for a screen issue, test twice — once in a dark room, once in ambient light. Take screenshots of each defect.

How to Test Your Samsung Screen

1. Clean your screen — Remove dust and fingerprints with a microfiber cloth.
2. Set brightness to maximum — In Quick Settings, drag the brightness slider to max.
3. Disable Eye Comfort Shield — Settings → Display → Eye Comfort Shield → Off.
4. Open this page on your Galaxy — The test works in Chrome or Samsung Internet.
5. Tap "Start Full Diagnosis" — The test runs in fullscreen mode.
6. Inspect each color — White, black, red, green, and blue.
7. Document any defects — Take screenshots for Samsung warranty claims.

Compatible Samsung Models

Our Samsung screen test works on every Galaxy with a modern browser — from the original Galaxy S to the latest Galaxy S24 Ultra and Z Fold 5.

Fully Supported Models

Browser Compatibility

Our Samsung screen test runs on:

• Samsung Internet — Android 10 and later
• Chrome — Android 10 and later
• Firefox — Android 10 and later
• Edge — Android 10 and later

💡 Pro tip: For the most accurate test on your Galaxy, disable Adaptive Brightness in Settings → Display → Brightness, and set your brightness to 100% before running the test.

When Should You Run a Samsung Screen Test?

Timing matters. The best moment to test your Galaxy screen is before it's too late — meaning before the return window closes or the warranty expires.

✅ Run This Test Immediately After Buying

Whether you just bought a new Galaxy or a used one, test it within the first 24 hours. Here's why:

• Return windows are short — 14 days for Samsung, 30 days for some carriers
• Defects are easier to return than repair — Samsung Store exchange is instant
• Samsung warranty limits — 1–2 dead pixels rarely qualify for a screen replacement
• Used Galaxies can hide defects — Sellers don't always disclose them

✅ Run This Test When Buying Used

If you're buying a second-hand Galaxy on eBay, Swappa, or Facebook Marketplace, always test it before paying. Open screenmedic.icu/devices/samsung.php on the device and run the test in person.

Common issues on used Galaxies:

• Hidden dead pixels
• AMOLED burn-in (especially on older S and Note models)
• Color tint from a replaced screen
• Physical damage to the panel

✅ Run This Test After a Drop or Impact

Galaxies are durable, but drops can damage the display. If your Galaxy has recently been dropped, run the test immediately. Physical impacts can cause new dead pixels or uniformity issues.

✅ Run This Test Monthly (Preventive)

Even if your Galaxy was perfect at purchase, defects can develop over time. Run a quick test once a month to catch any issues early — especially if you use your Galaxy heavily or leave the screen on for long periods.

✅ Run This Test Before Selling Your Galaxy

If you're selling your Galaxy, running the test helps you:

• Document the current condition — Protects you from buyer disputes
• Prove it works — Increases buyer confidence
• Justify your price — Clean test results = higher resale value

💡 Pro tip: Bookmark this page. You'll want to come back every time you buy, sell, or drop your Galaxy.

Related Tests You Should Run

If you're testing a Samsung Galaxy, here are the other tests you should run to get a complete picture of your device's health:

Frequently Asked Questions

Is this Samsung screen test really free?

Yes, absolutely. No hidden fees, no premium tiers, no account required. The test runs entirely in your browser and costs nothing.

Does this test work on Galaxy S24 Ultra?

Yes. Our test works on every Galaxy model — from the original Galaxy S to the latest Galaxy S24 Ultra and Z Fold 5. Just open this page in Chrome or Samsung Internet.

Will the test damage my Galaxy screen?

No. The test simply displays solid colors on your screen. It does not stress your hardware, does not overheat your panel, and does not cause burn-in. It's completely safe.

Can this test fix dead pixels?

No. Dead pixels are permanent hardware failures and cannot be fixed. However, stuck pixels can sometimes be fixed using our rapid color cycling feature. Read our Stuck Pixel Fix Guide for the full method.

How long does the Samsung screen test take?

Under 60 seconds. The full diagnostic cycles through 5 solid colors — white, black, red, green, and blue — in about 45-60 seconds.

Do I need to download an app?

No. The test runs entirely in Chrome or Samsung Internet on your Galaxy. No downloads, no Play Store, no signups.

Does it work on Galaxy Tab too?

Yes. Our test works on Galaxy phones and Galaxy Tab tablets. The test runs the same way on any Samsung device with a modern browser.

Is my data collected?

No. Everything runs locally in your browser. We do not collect, store, or transmit any personal data, screen contents, or diagnostic results.

What should I do if I find a dead pixel on my Galaxy?

If you're within Samsung's 14-day return window, return the Galaxy to a Samsung Store or your carrier. If you're past the return window, contact Samsung Support — the warranty may cover it if you have 3+ dead pixels. Read our Complete Dead Pixel Guide for more details.

Does Samsung cover AMOLED burn-in under warranty?

Yes, on most newer Galaxy models. Samsung considers AMOLED burn-in a defect covered by the standard 1-year warranty on S, Z Fold, and Z Flip series. Document the burn-in with photos before contacting support.

Can I test a used Galaxy before buying it?

Yes — this is one of the best use cases. Bring the Galaxy to a quiet spot, open screenmedic.icu/devices/samsung.php in Chrome, and run the test in person. It takes less than a minute and can save you from buying a defective device.

Does the test work on older Galaxy models?

Yes. Our test works on every Galaxy model with a modern browser — from the Galaxy S8 to the latest S24 Ultra. Older models with LCD screens (Galaxy A series) won't develop burn-in, but can still show dead pixels and uniformity issues.

Related Guides You Should Read

Want to go deeper? These expert guides will help you understand your Samsung screen and solve any issue: