Keyboard Matrix

Verify stuck keys, rollover behavior, and keyboard ghosting with a live browser-based keyboard tester.

How to interpret this keyboard test

Keys that never light up usually indicate a dead switch, disconnected ribbon, or a matrix issue rather than a typing habit problem.

If groups of keys fail together, think about matrix rows, columns, or liquid damage before assuming isolated switch failure.

What to try next if keys are missing

Use the typing test after this page to confirm whether the issue appears during real text entry, not just isolated presses.

On laptops, reboot once and test an external keyboard to separate OS/input issues from the built-in keyboard hardware path.