Complete Browser-Based Monitor, Display Hz, Mouse Switch & Keyboard Diagnostic Workbench
Whether you just unboxed a new 4K OLED/IPS monitor, bought a used MacBook, or suspect your gaming mouse has developed the dreaded accidental double-click bug, this 4-in-1 workbench runs hardware diagnostics directly in your browser without installing any desktop software:
- 10-Pattern Fullscreen Screen Inspector: Cycle through pure Black, White, RGB, CMY, 256-step Grayscale Gradient, and Sharpness Grid using your mouse or keyboard arrow keys.
- Live Display Refresh Rate (Hz) & UFO Motion Track: Measures real-time VSync frame intervals and compares native high-refresh motion clarity against 30 FPS and 15 FPS tracks.
- Mouse Micro-Switch Bounce & Keyboard NKRO Rollover: Logs sub-millisecond click intervals across Left/Middle/Right buttons to catch
<80msswitch faults and verifies N-Key Rollover on mechanical keyboards.
Frequently Asked Questions (FAQ)
Q1 What is the difference between a dead pixel, a stuck subpixel, and backlight bleed?
01
Dead Pixel： Appears as a tiny black dot on white, red, green, and blue backgrounds because all three RGB subpixels receive no power.
02
Stuck Pixel： Glows red, green, blue, or white on a pure black background because one or more subpixel transistors are stuck open.
03
Backlight Bleed / IPS Glow： Uneven light leaking around the edges or corners of an LCD/IPS monitor when viewing a pure black fullscreen image in a dark room.
Q2 Why does the Refresh Rate (Hz) benchmark show 60Hz on my 144Hz or 240Hz gaming monitor?
By default, Windows and macOS often initialize new external monitors at 60Hz, or browser battery-saver mode caps
requestAnimationFrame at 60 FPS. Open your OS Display Settings -> Advanced Display -> Refresh Rate to select 144Hz/240Hz, and plug in AC power if on a laptop. Q3 How does the Mouse Double-Click Fault Detector identify failing micro-switches?
When mechanical mouse micro-switches oxidize or wear out, a single physical finger press causes metallic contact bounce that fires two electrical clicks within 5ms to 75ms. Our detector measures high-precision performance.
now() deltas on Left, Middle, and Right buttons and flags any interval under 80ms as a switch bounce fault.