Dead Pixel & Monitor Hz Checker
Inspect your display in fullscreen solid colors to spot dead or stuck subpixels while verifying your live refresh rate (Hz).
Whether unboxing a new esports monitor or troubleshooting suspicious motion stutter, this quick diagnostic lets you confirm active Hertz output and isolate stuck or dead RGB subpixels edge-to-edge in fullscreen.
Dead pixels vs. stuck subpixels: how to tell the difference
A dead pixel fails to receive voltage across all three RGB subpixels and stays permanently black on Pure White, Red, Green, and Blue slides. A stuck pixel stays illuminated in one solid color (red, green, blue, or white) on the Pure Black screen because a transistor remains switched on.
Always wipe gentle screen dust before claiming an RMA โ surface dust mimics dark spots on bright screens, whereas true dead pixels remain sharp and grid-aligned from every viewing angle.
Why your new 240Hz or 360Hz gaming monitor might be stuck at 60Hz
Windows and graphics drivers frequently default high-refresh displays to 60Hz over HDMI or after a GPU driver clean install. The live Hz counter above uses your browser animation loop to confirm whether your active display output is genuinely running at 144Hz, 240Hz, or 360Hz+.
Want to visually compare 60Hz vs 240Hz/360Hz ghosting and overdrive clarity? Open our interactive Monitor Hz & Motion Blur Simulator.
Frequently Asked Questions
How do I cycle colors during the fullscreen dead-pixel check?
Click anywhere on the fullscreen background, press Space, or use Left/Right arrow keys to move across Pure Black, White, Red, Green, and Blue. Press Esc or Exit Fullscreen when done.
Why does the Live Hz Counter show 60Hz on my 240Hz monitor?
Check Windows Display Settings -> Advanced Display -> Choose a refresh rate, ensure you are using DisplayPort or HDMI 2.1, and verify power-saving mode is disabled in your browser.
Can stuck pixels be repaired without returning the monitor?
Sometimes. Unlike dead pixels (which are permanent hardware failures), stuck subpixels occasionally recover after gently massaging the area through a microfiber cloth or cycling rapid color frames.
