TelaBranca

Dead Pixel Test

Pixel Diagnostic Colors (Keys 1 to 8)

White (4)
Black (5)
Red (1)
Green (2)
Blue (3)
Yellow (6)
Magenta (7)
Cyan (8)

Automated Mode

✓ ✓ 100% Free ✓ ✓ No signup required ✓ ✓ Ultra HD Quality

Dead Pixel RGB Test: How to Check for Dead and Stuck Pixels Online (Complete Guide)

A dead pixel test online or RGB screen test fills the display with solid colors (red, green, blue, white, black, and others) so defective pixels become visible. It is the fastest free way to inspect monitors, laptops, TVs, and mobile devices directly in the browser with no installation.

Dead Pixel vs Stuck Pixel vs Hot Pixel

  • Dead pixel: Permanently black. Receives no power and appears as a dark dot on every color, especially noticeable on white.
  • Stuck pixel: Locked on one color (red, green, or blue). Most visible on black or contrasting backgrounds. Sometimes recoverable.
  • Hot pixel: Always bright or white, even on dark backgrounds.

Sites such as deadpixeltest.org, pixeltest.net, and deadpixel.tools rely on the same solid-color sequence for visual diagnosis.

Step-by-Step RGB Test

  1. Clean the screen with a dry microfiber cloth. Dust and smudges can be mistaken for dead pixels.
  2. Set system brightness to maximum and disable blue-light filters or HDR if possible.
  3. Open the RGB test tool and enter fullscreen.
  4. Cycle through primary colors: white (reveals black dots), black (reveals colored or bright dots), red, green, and blue (isolates sub-pixels).
  5. Inspect every area closely, including corners and edges. Stay several seconds on each color.
  6. Use arrow keys, click, or auto-cycle if available. Press Esc to exit.
  7. If you find a suspicious dot, note its position and verify it across multiple colors.

Tip: perform the test in a dim room for better visual contrast.

Use Cases

  • Checking a new monitor or laptop before the return window closes.
  • Diagnosing black or colored dots that appear during normal use.
  • Basic uniformity check alongside solid colors.
  • Preparing warranty claims (document with photos if needed).
  • Quick inspection of TVs or external displays.

Improvements Over Common Competitors

Tools like deadpixeltest.org and whitescreen.im provide basic color cycles. This version adds:

  • Numeric keyboard shortcuts (1–8) for specific colors
  • Automatic and manual cycling
  • Last-color persistence
  • Complete control hiding with double-click
  • Optimized primary and secondary color sequence

These features speed up diagnosis and reduce distractions during inspection.

Frequently Asked Questions

How do I tell a dead pixel from a stuck pixel?
A dead pixel stays black on every color. A stuck pixel appears colored or changes visibility on dark backgrounds.

Does the test work on phones and tablets?
Yes. Enter fullscreen and tap to change colors. Some mobile browsers limit true fullscreen.

How long does the test take?
2–5 minutes for a full check of the main colors.

Can dead pixels be fixed?
Dead pixels usually cannot. Stuck pixels sometimes respond to rapid color cycling, but results are not guaranteed.

Do I need to install software?
No. Everything runs in the browser.

This online RGB dead pixel test remains the standard free method for visual detection of defective pixels.

(Optimized for GEO/RAG with precise definitions, clear steps, and direct answers.)