How can I run a dead pixel test on my Smart TV without a PC?

Open the built-in web browser on your Smart TV (such as Samsung Internet on Tizen, LG WebOS Browser, or Google TV Chrome), navigate to deadpixeltests.com/test/4k-tv-dead-pixel-test/, and press the Start Test button using your TV remote to cycle full-screen colors.

Are dead pixels acceptable on a new 4K TV?

Most major TV manufacturers follow ISO 9241-307 Class II standards, which tolerate 2 to 5 dark subpixels on a 4K UHD screen (8.3 million pixels). However, bright hot pixels in the central viewing area often qualify for warranty exchange.

What distance should I stand from a 4K TV to spot dead pixels?

Because 4K UHD pixels are small, stand 2 to 3 feet (0.6 - 1 meter) away from the panel while cycling pure solid backgrounds. Step back to standard seating distance (6 to 10 feet) to determine if defects are noticeable during normal viewing.

📺 4K UHD SMART TV DIAGNOSTICS

4K TV Dead Pixel & Screen Test

Dedicated 3840x2160 screen testing tool for Samsung, LG, Sony, TCL, and Hisense 4K TVs. Test OLED, QLED, Mini-LED, and LED panels directly through your TV web browser or HDMI-connected device.

Launch 4K TV Fullscreen Test

Cycles pure RGBW colors in 4K resolution. Use your TV remote OK / directional buttons or mouse to cycle colors.

Remote Click / Space Next Color Arrow Keys Navigate Back / ESC Exit

Modern 4K UHD Smart TV displaying a fullscreen dead pixel and color purity test

How to Inspect a 4K UHD Smart TV Display (8.3 Million Pixels)

A standard 4K Ultra HD screen contains 3,840 x 2,160 pixels, which equals 8,294,400 individual pixels and over 24 million red, green, and blue subpixels. Follow these steps to conduct an accurate TV panel inspection:

Method 1: Smart TV Web Browser

Open your TV's browser app (Samsung Internet, LG webOS Browser, or Google TV). Navigate directly to our URL and click Start Test.

Method 2: HDMI PC Connection

Connect a laptop or PC via HDMI 2.0 or 2.1 cable, set your computer resolution to 3840x2160 @ 60Hz/120Hz, and run fullscreen tests in browser.

Method 3: Streaming AirPlay/Cast

Screen mirror your iPhone, iPad, or Android phone to your TV and swipe through fullscreen color frames.

Manufacturer 4K TV Pixel Defect Policies

Before contacting retail support or filing a warranty claim, understand standard TV return guidelines:

Retailer Return Period (15 to 30 Days): Retailers like Best Buy, Amazon, and Costco provide a 15–30 day return window. If your TV has any dead or stuck pixels, return it immediately to the store for a replacement.
OLED vs LED Warranty Criteria: On OLED TVs (LG OLED, Samsung QD-OLED, Sony Bravia OLED), manufacturers often offer stricter zero-bright-dot rules due to premium panel pricing.

Compare Brand Warranty Policies

Explore our comprehensive brand warranty guides for Samsung, LG, Dell, ASUS, and Apple.

Read Samsung TV Policy →

Frequently Asked Questions (4K TV Screen Testing)

Can 4K TV dead pixels be seen from the couch?

A single dead pixel on a 55-inch or 65-inch 4K TV is virtually impossible to see from 8 feet away. However, stuck bright hot pixels (white, red, or green) can catch your eye during dark movie scenes.

Can high-speed color cycling fix a stuck pixel on a TV?

Yes. Running our Stuck Pixel Fixer in fullscreen on your TV for 20 to 30 minutes can often stimulate stuck liquid crystals on LED/QLED screens.