Dead Pixel Test

Switch fullscreen solid colors to spot dark pixels, bright pixels, stuck subpixels, and other obvious panel defects.

Current color: White HEX: #FFFFFF Shortcuts: Left/Right switch, Space/F fullscreen, H toggle UI

Controls

Tip: Use fullscreen in a dim room and inspect the edges, corners, and center separately.

Dead, bright, or stuck?

A dead pixel usually stays dark on every background. A bright or stuck pixel remains lit or stays fixed in one color. Switching between white, black, and saturated colors makes those differences easier to confirm.

Record suspicious positions

These notes stay in this browser tab only. Use them to compare positions across several colors before contacting support or warranty service.

Before deciding it is a hardware defect

Check the same spot on several colors and from your normal viewing angle. If a dot only appears on one color or only from an extreme angle, document that before treating it as a confirmed dead pixel.

1. Enter fullscreen mode. 2. Cycle through white, black, red, green, blue, and gray backgrounds. 3. Scan the center, edges, and corners slowly. 4. Use the note box to record any suspicious location. 5. Re-check the same area on multiple colors before treating it as a confirmed defect.
This page helps you find visible pixel defects, but it cannot repair them, prove panel warranty eligibility, or diagnose every uniformity issue. Viewing angle, room lighting, and OLED burn-in concerns still require judgment.
Q: Can this fix a bad pixel? A: No. It only helps you detect and document it. Q: Is fullscreen safe for OLED screens? A: Yes for short checks, but avoid leaving a bright static color on screen for long periods. Q: Why should I compare several colors? A: Because a pixel that stays black on every color is different from one that stays bright or stuck in one channel.

Related tools

Continue with the next check that best matches the symptom you are troubleshooting.

Troubleshooting Center

Start with the symptom

Best next step

Screen Color Test: Grayscale, Gradients & Uniformity

Test grayscale separation, smooth gradients, shadow detail, highlight detail, RGB transitions, and panel uniformity with full-screen patterns.

Open tool

Display Check

Check display resolution, refresh rate, gradients, and motion clarity.

Open tool

Camera Check

Preview webcams, capture snapshots, and verify negotiated resolution and FPS.

Open tool