Can this website repair a physically dead pixel?

No. A physically dead subpixel cannot be repaired by software. The pixel fixer may only help with stuck pixels.

How should I test for light bleed accurately?

Use a dark room, disable dynamic contrast, set brightness near your normal usage level, and view the panel straight-on.

Monitor and Dead Pixel Test

Evidence-first browser diagnostics for LCD, OLED, and mini-LED displays.

F11 Fullscreen ESC Back to menu

Before You Start

Use your panel at its native resolution and disable post-processing features in your monitor OSD, such as dynamic contrast, sharpening, and noise reduction. For accurate results, run dark tests in a dim room and motion tests at your normal refresh rate.

Warm up the monitor for at least 10 minutes.
Set brightness to your usual daily level.
Run static tests first, then motion and HDR tests.

Diagnostic Modes

Methodology

Each test is designed for practical diagnosis rather than synthetic benchmark scoring. The goal is to help buyers and owners identify panel defects, tuning mistakes, and usage mismatches. We publish assumptions, limitations, and expected visual outcomes so you can validate results instead of trusting a black-box score.

Read full methodology

FAQ

Can this tool fix hardware defects?

No. It can help diagnose and occasionally recover stuck pixels, but it cannot repair physically dead subpixels, driver IC faults, or panel pressure damage.

Is this accurate for OLED and mini-LED?

Yes for visual inspection workflows. Absolute luminance and color-accuracy claims still require dedicated hardware meters.

Why does the refresh result differ from my monitor OSD?

Browser scheduling, V-Sync policy, and GPU compositing can introduce measured variance. Treat it as practical pacing quality, not an EDID replacement.