Laptop Keyboard Not Working? How to Find the Cause and Fix It
Laptop keyboard not working or only some keys respond? Test every key, check BIOS, fix drivers and Filter Keys, and know when the keyboard needs replacing.
Published by LaptopTestOnline Editorial Team
Laptop Keyboard Not Working? How to Find the Cause and Fix It
Quick answer: restart the laptop first, then open our free keyboard test and press every key. If no keys work, check whether the keyboard works in the BIOS or startup menu. If it does, the problem is in Windows or macOS, and reinstalling the keyboard driver or turning off Filter Keys usually fixes it. If only some keys fail, dirt, a spill or a worn key is more likely.
Keyboards fail in a few predictable ways, and each one points to a different fix. Testing before you change settings saves a lot of guessing.
Step 1: Test the keyboard to see what is really failing
Open the online keyboard tester and press each key once, including Fn, the arrow keys, and the number row. Watch for three patterns:
| Test result | Likely cause | Best fix |
|---|---|---|
| No key responds at all | Driver, setting, or keyboard cable | Software checks below, then BIOS test |
| A few keys in one area are dead | Liquid damage or a failing ribbon cable | Clean, dry, or repair |
| One key doesn't respond | Dirt under the key or a worn switch | Clean under the key |
| One press types twice | Key chatter from wear or debris | Clean, then replace if it continues |
| Wrong characters appear | Wrong keyboard layout or language | Change the input language |
| Keys work, but slowly | Filter Keys or a busy system | Turn off Filter Keys |
If keys repeat or stick, our guide to stuck and repeating keys goes deeper.
Step 2: Restart and rule out the simple causes
- Restart properly. On Windows, use Restart, not Shut down, because Fast Startup can keep a stuck driver alive after shutdown.
- Check the battery. Some laptops reduce power to the keyboard when the battery is almost empty. Plug in the charger.
- Unplug external keyboards and receivers. A wireless dongle or USB keyboard can confuse the input order on some systems.
- Check for a keyboard lock key. A few laptops have an Fn shortcut that locks the keyboard or swaps the number pad. Check the manual for your model.
Step 3: Check whether it works outside Windows or macOS
This is the most useful test of all. Restart and press the key that opens the BIOS or boot menu (F2, F10, F12 or Delete on most Windows laptops). If you can move around in that menu with the arrow keys, the keyboard hardware works and the fault is in software.
If the keyboard doesn't work in the BIOS either, it is almost certainly a hardware problem: the keyboard itself or the cable that connects it to the board.
Step 4: Fix software causes on Windows
Turn off Filter Keys and Sticky Keys
Filter Keys ignores short or repeated presses, which makes a keyboard feel dead. Go to Settings > Accessibility > Keyboard and turn off Filter Keys, Sticky Keys and Toggle Keys.
Reinstall the keyboard driver
- Right click Start and open Device Manager.
- Expand Keyboards.
- Right click your keyboard (often "Standard PS/2 Keyboard" on laptops) and choose Uninstall device.
- Restart. Windows installs the driver again automatically.
If there is a yellow warning sign next to the keyboard, install the chipset and keyboard drivers from your maker's support site.
Roll back a recent update
If the keyboard stopped after an update, go to Settings > Windows Update > Update history > Uninstall updates and remove the latest one, or use System Restore.
Check the keyboard layout
If keys type the wrong symbols, open Settings > Time & language > Language & region and make sure the right keyboard layout is first. Press Windows key + Space to switch between layouts.
Step 5: Fix software causes on a Mac
- Go to System Settings > Accessibility > Keyboard and turn off Slow Keys and Sticky Keys.
- Check System Settings > Keyboard > Input Sources for the right layout.
- Restart in Safe Mode to see whether an app or login item is blocking input.
- On older Intel Macs, resetting the SMC can clear keyboard and power faults. Apple's support site lists the steps for each model.
Step 6: Clean the keyboard
Dirt and crumbs are a common reason for single dead keys.
- Turn the laptop off and unplug it.
- Hold it at an angle and use short bursts of compressed air across the keys.
- Wipe the keys with a slightly damp lint-free cloth and a little isopropyl alcohol.
Avoid prying keycaps off unless you know your model allows it. Many laptop keycaps clip on with fragile plastic.
Step 7: Deal with spills right away
If you spilled a drink on the keyboard, turn the laptop off at once, unplug it, and turn it upside down in a tent shape to drain. Leave it for at least 48 hours. Sugary drinks leave sticky residue that keeps keys from working even after they dry, and those usually need a professional clean or a new keyboard.
Step 8: Use a workaround while you wait
You can keep working with:
- A USB or Bluetooth keyboard.
- The on-screen keyboard (on Windows, Windows key + Ctrl + O).
- Voice typing (Windows key + H on Windows, or Dictation on a Mac).
When to replace the keyboard
Replacing the keyboard is a common, fairly cheap laptop repair, but on many thin laptops the keyboard is joined to the top case, which raises the price. Get a repair quote if:
- The keyboard fails in the BIOS too.
- A whole row or area is dead.
- It started after a spill or a drop.
- The laptop is still under warranty, since keyboards are usually covered.
After any repair, run the keyboard test again and check the mouse and touchpad test, because the touchpad often shares a cable with the keyboard.
Common questions
Why did my laptop keyboard suddenly stop working?
The most common reasons are a driver problem after an update, Filter Keys turned on by accident, or a low battery. Restart, plug in the charger, and check accessibility settings first.
How do I reset my laptop keyboard?
On Windows, uninstall the keyboard in Device Manager and restart. Windows reinstalls it with default settings. On a Mac, check Input Sources and accessibility settings.
Can I use my laptop if the keyboard is broken?
Yes. Connect a USB or Bluetooth keyboard, or use the on-screen keyboard until you get it repaired.
Why do only some keys on my laptop keyboard work?
A group of dead keys usually means liquid damage or a loose ribbon cable. A single dead key is usually dirt or a worn switch.
Cover photo by Disk Depot Ltd.: MacBook keyboard shallow focus closeup, Wikimedia Commons, CC BY-SA 4.0. Cropped for this article.
