Keyboard Test
Free Online Keyboard Tester
Press each key on your keyboard to check if it registers correctly. Every key lights up green when it works.
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Connect a physical keyboard to test keys. Touch-screen taps cannot trigger keyboard events.
Mouse Tester — Click or scroll inside this area
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Press any key or click / scroll your mouse to test. A physical keyboard and mouse are required — touch taps do not trigger key events.
เครื่องมือ Tools
วิธีใช้ทดสอบคีย์บอร์ด
- 1
คลิกที่ใดก็ได้บนหน้าเพื่อเปิดใช้งานคีย์บอร์ด
- 2
Press each key on your physical keyboard one by one.
- 3
Each key turns green when it registers. Keys that stay gray have not been tested yet.
- 4
ใช้ปุ่ม "รีเซ็ต" เพื่อเริ่มใหม่
การแก้ไขปัญหาคีย์บอร์ด
If a key is not lighting up green, something is wrong. Work through these steps one by one before assuming your keyboard needs replacing.
1ปุ่มไม่ตอบสนองเลย
- Unplug the keyboard and plug it back in firmly. A loose USB connection is the most common reason a key stops working.
- Try a different USB port, preferably one directly on your computer rather than a hub or extension cable.
- Connect the keyboard to another computer. If the key works there, the problem is a driver or software issue on your original machine, not the hardware.
- เปิด Device Manager และตรวจสอบคีย์บอร์ดสำหรับข้อผิดพลาด
- On Windows, run the built-in keyboard troubleshooter: Settings → System → Troubleshoot → Other troubleshooters → Keyboard.
2ปุ่มบางครั้งตอบสนอง บางครั้งไม่
- This is almost always a sign of debris under the keycap. Remove the keycap carefully with a keycap puller or a flat tool, and use compressed air to blow out dust, crumbs, and hair.
- If cleaning does not help, the switch itself may be worn or damaged. On a mechanical keyboard, the switch can often be desoldered and replaced individually without buying a new board.
- Check whether the problem happens more when you press lightly versus firmly. A weak spring or a worn switch stem causes inconsistent actuation when pressed at an angle.
- Make sure no software macro or remapping tool (such as AutoHotkey, SharpKeys, or a manufacturer utility) is intercepting that specific key.
3Multiple keys stop working at once
- Spill damage is the most likely cause. Immediately unplug the keyboard, flip it upside down, and let it dry for at least 48 hours before testing again. Do not use heat to speed this up.
- ตรวจสอบขีดจำกัด anti-ghosting หรือ N-key rollover
- Certain key combinations are blocked by design on older keyboards due to how the key matrix is wired. This is a hardware limitation and cannot be fixed in software.
4ปุ่มค้างหรือกดซ้ำต่อเนื่อง
- Hold the key down and rock it gently side to side, then try the test again. A stuck stabilizer or a piece of debris is physically preventing the switch from returning to its rest position.
- On Windows, open Settings → Accessibility → Keyboard and disable Filter Keys. Filter Keys ignores rapid or repeated keypresses and can make a key look broken when it is actually fine.
- ปิด Sticky keys และ Toggle keys
- ตรวจสอบความล่าช้าและความเร็วการกดซ้ำในการตั้งค่า OS
5Modifier keys (Shift, Ctrl, Alt, Win) behave strangely
- กดและปล่อยแต่ละปุ่ม modifier ทีละปุ่ม จากนั้นทดสอบอีกครั้ง
- On Windows, pressing the left Alt key five times can accidentally activate Sticky Keys. Dismiss the Sticky Keys prompt if it appears.
- ปุ่ม Windows อาจถูกปิดใช้งานโดย Fn lock หรือสวิตช์โหมดเกม
6ปัญหาคีย์บอร์ดเฉพาะ OS
- Most modern keyboards ship with the Fn layer active by default, meaning pressing F1 controls brightness instead of sending an F1 keypress. Look for an Fn Lock key or hold Fn while pressing the key to toggle this behavior.
- Linux: บาง kernel จัดการรหัสปุ่มแตกต่างกัน ลอง "setxkbmap" เพื่อรีเซ็ต layout
- In Windows, some applications like Dell, HP, or Lenovo companion apps take control of F1–F12 at a system level. Closing these apps temporarily can restore normal function key behavior.