How to Run a Dead Pixel Test
Clean the screen, increase the browser window to fullscreen, and inspect every area while cycling through red, green, blue, white, and black test colors.
Online Dead Pixel Test
Use fullscreen solid colors to find dead, stuck, or bright pixels on monitors, laptops, TVs, and phones.
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赤
デッドピクセルの検出と色精度のテストのための原色の赤。
任意の場所をクリックしてコントロールを非表示にする
テストカラー
6色利用可能原色（デッドピクセルテスト）
How to Use the Dead Pixel Test
- 1Open the test in fullscreen so every pixel is visible.
- 2Cycle through red, green, blue, white, and black screens.
- 3Look for dots that stay black or remain stuck on one color.
- 4Note the location and repeat the check before requesting a return.
Dead Pixel vs Stuck Pixel
A dead pixel usually stays black because it produces no light. A stuck pixel remains fixed on one color, such as red, green, or blue. Test several backgrounds because a defect can be easier to see on a contrasting color.
Check a New Monitor Before the Return Period Ends
Test the center, edges, and corners at normal viewing distance, then repeat at different brightness levels. Record the location of any persistent defect before contacting the seller or manufacturer.