What is the difference between a dead pixel and a stuck pixel?

A dead pixel is a completely unpowered transistor; it remains permanently black on white or colored backgrounds and cannot be fixed with software. A stuck pixel is a liquid crystal subpixel frozen in an open position; it appears as a permanent red, green, or blue dot and can often be revived using high-frequency color exercisers.

How does the Stuck Pixel Fixer work?

The Stuck Pixel Fixer rapidly cycles primary RGB colors at 60 FPS over a designated screen area. This rapid voltage oscillation exercises the stuck liquid crystal, helping it untangle from its frozen state and regain normal electrical responsiveness.

How many dead pixels are allowed before I can return my monitor under warranty?

Most consumer monitors fall under ISO 9241-307 Class II standards, which allow up to 2 permanently bright pixels, 2 completely dead black pixels, or 5 defective subpixels per million pixels before a manufacturer warranty replacement is granted.

Can a dead pixel spread across the monitor?

No. Each pixel on an LCD, OLED, or IPS panel operates with an independent microscopic thin-film transistor. A dead pixel does not spread to adjacent pixels unless physical panel impact damage or severe delamination has cracked the glass substrate.

⚡ Instant Fullscreen Monitor & Display Pixel Defect Checker

Dead Pixel Test: Check & Fix Screen Pixels Online

Test computer monitors, laptop displays, OLED TVs, and smartphones for dead pixels, stuck subpixels, and backlight bleed. Use fullscreen primary color sweeps and the 60Hz stuck pixel repair tool.

Quick Color Presets:

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Launch Fullscreen Pixel Inspection

Fills 100% of your screen with solid primary colors to expose dead black dots or stuck colored subpixels. Tap screen or press Spacebar to cycle colors.

Screen Resolution 1920 × 1080

Device Pixel Ratio 1.0x

Color Depth 24-bit (sRGB)

Display Refresh Rate 60 Hz

How to Test for Dead Pixels in 3 Steps

Clean Your Screen

Wipe your screen with a clean microfiber cloth. External dust flecks and smudges are frequently mistaken for permanent pixel defects.

Inspect Primary Colors

Launch fullscreen and cycle through Black, White, Red, Green, and Blue. Dead pixels appear as permanent black specs on bright colors.

Run the Stuck Pixel Fixer

If you find a stuck colored dot (red, green, or blue), drag our high-frequency RGB repair box over the pixel for 10 to 20 minutes to un-stick the crystal.

The Complete Guide to Dead, Stuck & Hot Pixel Diagnostics

Every modern digital display (OLED, IPS, VA, Mini-LED) is comprised of millions of microscopic picture elements called pixels. Each individual pixel contains three subpixels: Red, Green, and Blue.

Dead vs. Stuck vs. Hot Pixels Explained

Understanding which type of pixel defect your screen possesses determines whether it can be fixed with software or requires an RMA warranty replacement:

Dead Pixel (Black Dot): The transistor controlling the pixel has completely failed or lost electrical power. On a white or colored background, it remains entirely black. Dead pixels cannot be repaired by software.
Stuck Pixel (Colored Dot): One or two of the RGB subpixels are frozen in an active open state, allowing backlight through. It appears as a permanent bright red, green, blue, or yellow dot. These can often be revived with rapid color cycling.
Hot Pixel (Permanent White Dot): All three subpixels are stuck open simultaneously, displaying as a bright white dot even on pure black backgrounds.

ISO 9241-307 Monitor Warranty Standards

Manufacturers rarely guarantee a zero-dead-pixel policy on budget screens. The international ISO 9241-307 standard defines acceptable pixel defect classes for monitors:

Class 0: Zero defects allowed (surgical displays and military-grade panels).
Class 1: Extremely strict (up to 1 bright or dead pixel per million).
Class 2 (Most Consumer Displays): Permits up to 2 bright pixels, 2 dead pixels, and 5 stuck subpixels per million pixels (approx. 4 to 8 defects on a standard 4K monitor).

Can Gentle Pressure Massage Fix a Stuck Pixel?

For persistent stuck subpixels on standard LCD/IPS monitors, some users apply light, blunt pressure using a soft microfiber cloth wrapped around a stylus while running color cycles. Warning: Never use physical pressure on OLED, QD-OLED, or curved displays, as fragile organic layers can easily crack and void your warranty.

Display Panel Technologies & Pixel Defect Matrix

Reference guide comparing defect symptoms and repairability across major display panel types:

Display Panel Type	Default Dead State	Stuck Pixel Symptoms	Software Fix Rate	Common Root Cause
IPS (In-Plane Switching)	Black (Normally Black)	Bright Green or Red Dots	Moderate (~45-60%)	Transistor gate friction, particle obstruction
OLED / QD-OLED	Black (No Current)	Permanent Bright Pixel	Low (~15-25%)	Short-circuited subpixel TFT or micro-short
VA (Vertical Alignment)	Black / Dark Gray	Bright Subpixels	Moderate (~40-50%)	Liquid crystal alignment sluggishness
TN (Twisted Nematic)	White (Normally White)	Permanent Black on White	High (~60-70%)	Un-energized crystal spring relaxation

Frequently Asked Questions

How do I exit the fullscreen test mode?

Press the Esc key on your keyboard, or double-tap anywhere on the screen on mobile devices to exit fullscreen mode at any time.

How long should I run the Stuck Pixel Fixer?

Position the animated 60Hz RGB box directly over the stuck pixel and let it run for 15 to 30 minutes. If the subpixel does not un-stick after 1 hour, the transistor is likely physically damaged.

Does running this test risk screen burn-in on OLED displays?

No. Burn-in on OLED screens requires displaying a static, unchanging bright image for hundreds of continuous hours. Cycling through test colors for a few minutes poses zero burn-in risk.

Can I test my smartphone or tablet screen here?

Yes. The tester is fully mobile-responsive. On phones and tablets, tap anywhere on the screen to advance to the next test color, and double-tap to return to the menu.