What should you check on a keyboard?
Start by confirming that every key registers one press and one release. Then test the combinations you actually use for gaming or work, especially keys pressed at the same time.
How to test it step by step
Open ACC64 Keyboard Test, start the test, and press keys one by one. Watch for missing input, repeated input, or a key that appears held after release. Then press several keys together, such as your usual movement combination in a game.
Ghosting and key rollover explained
Ghosting is a broad term for incorrect behavior with certain multi-key combinations, while rollover describes how many simultaneous presses a keyboard can report correctly. The result depends on the keyboard design and matrix.
What if a key does not work?
Repeat the test using another USB port and, if possible, another computer. For wireless keyboards, check power and connection quality. If the same key consistently fails across applications, the issue may be hardware-related.
If the result looks suspicious, reconnect the device and repeat the test. A browser test can reveal a symptom, but confirming it in another app or computer helps narrow down the cause.
Frequently asked questions
Does the test require installation?
No. ACC64 runs in a compatible browser without installing extra software.
Does a failed test always mean hardware is broken?
Not always. Repeat the test, check the connection and system settings, and if possible compare on another device or computer.