Keyboard Key Not Working?

One dead key can ruin your day. Here's how to find out if it's the keyboard, and how to fix it.

Test Every Key

Open the keyboard tester and press every key. Keys that don't turn green didn't register.

Fixes to Try

• Turn the keyboard upside down and gently tap it to free crumbs.
• Blow compressed air under the key.
• Pop off the keycap (on mechanical keyboards) and clean underneath.
• Check Fn Lock, gaming mode and Filter Keys in accessibility settings.
• Try another USB port or computer.

Key Repeating on Its Own?

That's key chatter, the keyboard version of a mouse double-click. Cleaning can help. If not, the switch needs replacing.

Final Thoughts

If you rely on your keyboard for work, keep a spare. A basic USB keyboard costs little and saves a lot of stress when a key fails at the worst moment.

Try It Now

Open the keyboard tester now and press every key to see where you stand.

One Last Tip

Most key problems are simple to fix with a little cleaning and a few settings checks. Test first, then work through the steps in order, and you'll usually have every key working again within minutes.

Quick Fix Checklist

1. Test the key on the keyboard test to confirm it's the hardware, not one app.
2. Restart your computer.
3. Check for a stuck modifier like Fn Lock, Num Lock or Sticky Keys.
4. Try another USB port, or re-pair the Bluetooth keyboard.
5. Remove the keycap and blow out any dust.
6. Check your keyboard software for a remapped or disabled key.
7. Try the keyboard on another computer.

If the key fails on every computer, the switch or the board is at fault. If it only fails on one computer, it's a software or driver problem.

Laptop Keyboards: Extra Things to Try

• Update the keyboard and chipset drivers from your laptop maker.
• Uninstall the keyboard in Device Manager and restart, so Windows reinstalls it.
• Check whether the key works in the BIOS or boot menu. If it does, the problem is in Windows.
• Use an external keyboard while you wait for a repair.

Mechanical Keyboard Switch Problems

On a hot-swap mechanical board, you can pull the switch with a switch puller and try a new one. On a soldered board, a few drops of switch-safe contact cleaner and pressing the key 50 times can bring a dusty switch back. If it chatters, meaning it types twice, the switch is usually worn and needs replacing.

Quick Summary

• Test online first to see whether it's hardware or software.
• Check Fn Lock, Sticky Keys and remapping software.
• Clean under the keycap with compressed air.
• Try the keyboard on another computer.
• Replace the switch if it still fails or chatters.
• Use an external keyboard on a laptop while you wait for a repair.

When to Get It Repaired

If a key on a laptop still fails after a driver reinstall and works in the BIOS, it's a software issue you can fix at home. If it fails in the BIOS too, the keyboard itself is faulty. Laptop keyboards are often one part, so a repair shop will usually replace the whole keyboard rather than a single key.

Identify the Problem

Start with the keyboard tester to see exactly which keys are affected.

Software Checks

• Check the keyboard layout and language in your system settings.
• Turn off Filter Keys and Sticky Keys (Windows accessibility settings).
• Check for a gaming mode or Windows key lock on gaming keyboards.
• Update or reinstall the keyboard driver.
• Test in a different app or user account.

Cleaning a Mechanical Keyboard

1. Unplug the keyboard.
2. Use a keycap puller to remove the affected keycap.
3. Blow compressed air into the switch.
4. Press the switch rapidly 20 to 30 times.
5. Wipe around it with a cotton swab and a little isopropyl alcohol.
6. Replace the keycap and test.

Cleaning a Laptop Keyboard

Laptop keycaps are fragile, so avoid removing them unless you know how. Turn off the laptop, tilt it at an angle and use short bursts of compressed air around the affected key. Gently press the key repeatedly. For sticky keys after a spill, a cotton swab lightly dampened with alcohol around the edges can help. If several keys fail after a spill, stop using the laptop and get it checked, as liquid can damage the motherboard.

Replacing a Switch

On hot-swap mechanical keyboards, you can pull out a faulty switch and push in a new one in seconds. On soldered keyboards, replacing a switch needs desoldering. On membrane and laptop keyboards, individual keys usually can't be repaired, and the whole keyboard needs replacing.

Keyboard Not Working at All?

If no keys work, check the basics first. Try another USB port, cable or computer. For wireless keyboards, replace the batteries, re-pair over Bluetooth, or plug the receiver into a different port. On laptops, restart and check whether the keyboard works in the BIOS or startup screen. If it does, the problem is software. If it doesn't, it's hardware. Also check that a key lock switch or Fn+key combination hasn't disabled the keyboard, which some gaming and laptop keyboards have.

Keys Typing Wrong Characters

If keys type the wrong characters, your keyboard layout probably doesn't match your keyboard. On Windows, check Settings, Time & language, Language & region. On Mac, check System Settings, Keyboard, Input Sources. A common sign is @ and " swapped, which happens between US and UK layouts. Our keyboard tester shows the physical key you pressed, which helps you spot layout mismatches.

Summary

Test every key first, then work through software checks, cleaning and repair. Most single-key problems are dirt or a worn switch, and most are fixable.

Key Takeaways

• Test every key to find the problem.
• Check layout and accessibility settings.
• Clean under the key.
• Replace the switch on mechanical keyboards.
• Get spilled laptops checked quickly.

Preventing Keyboard Problems

Keep food and drinks away from your keyboard, or use a cover. Clean it monthly with compressed air and a damp cloth. On mechanical keyboards, a deep clean every few months, removing all keycaps, keeps switches healthy. Avoid eating crumbly snacks over the keyboard: crumbs are the most common cause of dead or sticky keys.

Frequently Asked Questions

Related Guides

• Keyboard Ghosting and Rollover Explained