Keyboard Tester

N-Key Rollover refers to a keyboard’s capability to detect any number of simultaneous key presses without missing a single input. Standard office keyboards often struggle when more than 3 to 6 keys are pressed at once, causing blocked signals or phantom inputs (ghosting). Gaming and premium mechanical keyboards feature anti-ghosting diodes on every switch to ensure complete key registration.

1. Try different USB ports: Plug directly into the rear motherboard port to avoid insufficient power from USB hubs.
2. Clean debris: Remove keycaps and use compressed air to blow out dust and debris around the switch stems.
3. Contact cleaner: Unplug the keyboard and apply a quick-evaporating electronic contact cleaner directly into the affected switch.
4. Swap switches: If your keyboard is hot-swappable, exchange the malfunctioning switch with a spare to pinpoint whether the switch or the PCB is faulty.

Many modern keyboards and laptops possess an Fn-Lock feature. If active, function keys act as multimedia toggles rather than standard F1-F12. Check for an Fn-Lock key combination (often Fn + Esc). Also, gaming models often feature a Windows Key Lock (Fn + Win) to prevent accidental tab-outs during gameplay.

• Blue (Clicky): High tactile bump with an auditory click, favorite among typists who enjoy audible feedback.
• Brown (Tactile): Soft tactile bump without the loud click, ideal hybrid for both gaming and daily typing.
• Red / Black (Linear): Smooth, uniform resistance straight down, favored by gamers for rapid double-taps.
• Silent Red (Silent Linear): Fitted with internal silicone dampers for ultra-quiet operation in office environments.