ToolsFree browser-based screen test

LCD Screen Test

An LCD-focused workflow for pixels, bleed, glow, black depth, banding, ghosting, color, and luminance uniformity.

Device guides
Test workspace

Use every mode and inspect the entire panel, including corners and edges.

Completed 0 of 8 checks
  1. Step 1 of 8

    Dead Pixel Test

    Cycle full-screen colors and custom fields to find stuck, dead, bright, or dim pixels across the panel.

    Start this check
  2. Step 2 of 8

    Backlight Bleed Test

    Display black and low-gray fields in a dark room to distinguish edge bleed, clouding, IPS glow, and uneven backlighting.

    Start this check
  3. Step 3 of 8

    Black Level Test

    Compare pure black, near-black steps, and embedded dark patterns to inspect black depth, glow, and crushed detail.

    Start this check
  4. Step 4 of 8

    Greyscale Test

    Adjust 4 to 64 gray levels and inspect full-range blocks, shadow detail, highlights, and uniformity.

    Start this check
  5. Step 5 of 8

    Color Banding Test

    Use lossless channel and luminance gradients with adjustable steps to expose visible contour bands.

    Start this check
  6. Step 6 of 8

    Ghosting Test

    Track moving shapes, text, and fine lines at several speeds to reveal response trails, black smearing, and overdrive overshoot.

    Start this check
  7. Step 7 of 8

    Color Accuracy Test

    Compare reference patches, neutral gray ramps, and saturation steps for obvious hue, balance, and clipping errors.

    Start this check
  8. Step 8 of 8

    Brightness Test

    Adjust luminance patterns, inspect nine zones, and compare tone steps for range and uniformity problems.

    Start this check
How to use this test

A repeatable process gives more useful results than a quick glance.

01

Prepare the display

Clean the screen, use the device's native resolution, and let brightness stabilize before running LCD Screen Test.

02

Scan methodically

Run every available mode. Move your eyes across the center, edges, and corners instead of staring at one point.

03

Confirm the result

Repeat suspicious patterns at two brightness levels and compare with another display when possible.

What the result can tell you

LCD Screen Test

This guided sequence covers the most common display faults for this device class and keeps the checks in a useful inspection order.

Testing notes

Disable night-light, color filters, and automatic brightness while comparing colors or tones.

Use a dim room for dark patterns and normal ambient light for color and brightness checks.

Stop flashing or high-contrast motion tests immediately if they cause discomfort.

Related tests

Panel tests

Dead Pixel Test

Cycle full-screen colors and custom fields to find stuck, dead, bright, or dim pixels across the panel.

Panel tests

Backlight Bleed Test

Display black and low-gray fields in a dark room to distinguish edge bleed, clouding, IPS glow, and uneven backlighting.

Panel tests

Black Level Test

Compare pure black, near-black steps, and embedded dark patterns to inspect black depth, glow, and crushed detail.

Panel tests

Greyscale Test

Adjust 4 to 64 gray levels and inspect full-range blocks, shadow detail, highlights, and uniformity.

Frequently asked questions

Can this test prove that my screen is defective?+

It can reveal visible symptoms and help you reproduce them, but warranty decisions should be based on the manufacturer's policy and, when needed, instrument measurements.

Are any test results uploaded?+

No. Patterns, calculations, touch trails, and browser measurements run locally in this tab.

Why does the result change with brightness or viewing angle?+

Panel technology, local dimming, tone mapping, viewing angle, ambient light, and automatic display controls can all change what you see.