How to Run a Dead Pixel Test on Your Nintendo Switch or Steam Deck

You turn on your Switch or Steam Deck and something catches your eye. A tiny dot on the screen that does not move, no matter what you are playing.

Is it a dead pixel? A stuck pixel? Or just a speck of dust?

Handhelds are especially tricky to inspect because the screens are small and the pixels are tightly packed. A defect that looks massive under a magnifying glass can be nearly invisible during a game. But on a solid color background, it shows up immediately.

Why Handheld Screens Get Dead Pixels

The Nintendo Switch uses a 7-inch LCD panel (or 7-inch OLED on the Switch OLED model). The Steam Deck uses a 7-inch LCD on the original model and a 7.4-inch OLED on the OLED model. Every pixel on those panels is a microscopic component — and like any component, they can fail.

Manufacturing defects are the most common cause. Even with modern quality control, it is statistically normal for a small percentage of panels to have one or two pixel faults. The question is whether the fault falls in a noticeable spot.

Physical damage is the other culprit. A drop, a knock against a hard surface, or pressure on the screen can shatter sub-pixel cells. If your screen recently took a hit, test it right away before the warranty claim window closes.

Dead Pixel vs. Stuck Pixel — Know What You Are Looking For

These two terms get mixed up constantly, but they are very different problems.

Dead pixel: Shows as a tiny black dot on light backgrounds. The pixel has completely failed and is receiving no power. Dead pixels are permanent and cannot be fixed.

Stuck pixel: Shows as a colored dot (red, green, or blue) on dark backgrounds. The pixel is frozen in an "on" state. Stuck pixels can sometimes be revived with rapid color-cycling.

For a deeper explanation of both types, read our guide on Dead Pixel vs. Stuck Pixel.

How to Open a Browser on the Nintendo Switch

Here is the part that trips everyone up. The Switch does not show a browser icon on the home screen — but the browser is absolutely there. Here are two ways to get to it:

Method 1 — Use a sign-in Wi-Fi network: Connect to a hotel, airport, or coffee shop Wi-Fi that requires a sign-in page. The Switch automatically opens a browser to display the captive portal. Type deadpixelcheck.com in the address bar instead.

Method 2 — Use a Nintendo News link: Open the News app from the home screen, find any Nintendo article that links to an external website, and tap the link. This opens the browser, and you can navigate from there.

Step-by-Step: How to Test Your Screen

Once you have a browser open, the test is straightforward.

Step 1: Clean the Screen First

Wipe the screen gently with a dry microfiber cloth. Fingerprints and dust can look deceptively like pixel defects on a solid white background. A clean screen gives you accurate results.

Step 2: Turn Brightness All the Way Up

Maximum brightness makes pixel defects much easier to spot. On the Switch, press and hold the home button and adjust the screen brightness slider. On the Steam Deck, use the Quick Access Menu (the three-dot button).

Step 3: Open DeadPixelCheck.com

Navigate to DeadPixelCheck.com in the browser and put the page in full screen if possible. You want as much of the screen covered in solid color as you can get.

Step 4: Run the White Test

Select white to fill the screen. Scan every corner and the center carefully. Any tiny black dot that is not a smudge is a dead pixel.

Step 5: Run the Black Test

Switch to black. Look for any bright colored dot — red, green, or blue. On OLED models (Switch OLED and Steam Deck OLED), true black makes stuck pixels incredibly easy to spot because they glow against the background.

Step 6: Cycle Through Red, Green, and Blue

Some sub-pixel defects only show up on their matching color channel. A failing red sub-pixel might only be visible on a red background. Cycle through all three colors to catch everything.

Nintendo Switch: What Nintendo Says About Dead Pixels

Nintendo's official policy is that a small number of stuck or dead pixels on the Switch screen may be considered within manufacturing tolerances — meaning they may not automatically qualify for warranty replacement.

This sounds frustrating, but here is the reality. If your Switch is within 30 days of purchase, most retailers (Best Buy, GameStop, Amazon) will exchange it without requiring you to contact Nintendo at all. Take the unit back and show them the defect.

If you are past the 30-day retail window but within the one-year Nintendo warranty, contact Nintendo support directly. Multiple dead pixels, or a defect in the center of the screen, significantly improves your odds of getting a replacement. A single dead pixel in the corner is harder to argue.

Steam Deck: Valve's Approach to Dead Pixels

Valve is generally more straightforward about pixel defects. The Steam Deck warranty covers manufacturing defects, and Valve has replaced units for single dead pixels that are in prominent locations.

If you find a defect, submit a support ticket through Steam Support. Attach your screenshot of the defect on a solid white or black background. Valve's support team typically responds within a few business days and can arrange an RMA (return merchandise authorization) if the defect qualifies.

The original Steam Deck has a one-year limited warranty. The Steam Deck OLED extended this to two years in most regions. Check Valve's support site for the current terms in your country.

Can a Stuck Pixel on a Handheld Be Fixed?

Sometimes. The same rapid color-cycling technique that works on monitors can work on handheld screens. On DeadPixelCheck.com, tap "Auto Cycle" and let it run for 15 to 30 minutes. Some stuck pixels respond to this and return to normal.

Do not attempt any pressure-based fixes (like the pencil eraser method) on an OLED screen. OLED panels — including the Switch OLED and Steam Deck OLED — use organic compounds that are permanently damaged by pressure. Stick to the software approach only.

For LCD models, the pressure method is theoretically possible, but it carries real risk of causing more damage. On a device as small as a Switch or Steam Deck, that risk rarely makes sense. Warranty replacement is almost always the better move.

When to Test Your Handheld Screen

Run a dead pixel test in these situations:

• Right after unboxing — Test before your return window closes. Defects present from day one are the manufacturer's problem, not yours.
• After a drop or impact — Physical shock can kill pixels. Test immediately and document any new defects.
• After a screen repair — Third-party replacement screens vary in quality. Test the new screen before sealing up the device.
• Before selling or trading in — Know the screen condition so you can price accurately and disclose honestly.

Related Guides

• Dead Pixel vs. Stuck Pixel: What's the Difference? — Understand what type of defect you are dealing with.
• Dead Pixel Test for Phones — The same method works on your iPhone or Android screen.
• Dead Pixel Warranty Guide — How to navigate return and repair claims like a pro.