Laptop Keyboard Not Working? Causes and Fixes

You open the laptop to type an urgent message, and nothing happens when you press the keys. The cursor blinks, the screen looks fine, and the keyboard is silent. When a laptop keyboard is not working, a few free tests will show whether the cause is a setting, a driver, a dirty key, or the keyboard itself.

Quick Info: The 60-Second Emergency Typing Fix

1. Open Start, then go to Settings > Accessibility > Keyboard and turn on the On-Screen Keyboard. Microsoft says you can also select the Accessibility button at the lower-right corner of the sign-in screen and choose On-Screen Keyboard.
2. If you cannot reach Settings, plug in a USB or wireless keyboard. An external keyboard works as a stopgap while you troubleshoot.
3. If the external keyboard types normally, your Windows settings are probably fine and the laptop keyboard is the problem.
4. Restart the laptop. A restart clears many temporary driver glitches.
5. If the laptop keyboard is still dead, test it in the BIOS (steps in section 1).

Key Takeaways

• The BIOS test separates software from hardware. If keys work in the BIOS but not in Windows, the cause is more likely a driver or a setting than the keyboard itself.
• Windows accessibility features can fool you. Filter Keys is meant to ignore brief or repeated keystrokes, so it can make a working keyboard feel dead or slow.
• Liquid is a serious risk. Dell says to power off right away, drain the laptop, and let it dry for at least 24 to 48 hours before use.
• Dust and crumbs cause single-key failures. Compressed air and a dry microfiber cloth are the safest first steps, according to Dell.
• A failed keyboard or cable needs service. If an external keyboard works and the BIOS test fails, plan on a repair by an authorized provider.

How This Guide Was Verified

We verified every diagnostic path in this guide against the manufacturer documentation we could access, and we label anything else as general repair knowledge.

Specifically, we checked Microsoft’s On-Screen Keyboard page, Dell’s “Laptop Keyboard Isn’t Working” article, Dell’s hard reset article, Lenovo’s article on keyboard keys that do not work, and an iFixit troubleshooting page. We did not read ACPI specifications or laptop service manuals, so we could not confirm every internal detail for your model.

This guide compiles documentation. It does not include results from our own keyboard testing, and we cannot diagnose your laptop from a description. Following these steps keeps you away from destructive mistakes, such as prying up keys with a knife or pouring liquid onto the keyboard.

Laptop Keyboard Failures: Symptom Matrix

1. Bypassing Windows With the UEFI/BIOS Input Test

First, find out whether the keyboard works outside Windows. The BIOS screen is drawn by the laptop’s firmware before Windows loads, so it does not depend on your Windows drivers.

Enter the UEFI/BIOS Setup

1. Shut the laptop down completely.
2. Press the power button, then tap F2, F10, or Del repeatedly. The key differs by brand.
3. On many Lenovo laptops, press the Novo button, a small pinhole button, with the laptop off. Choose BIOS Setup from the menu.
4. Wait for the UEFI/BIOS Setup screen.

Check your maker’s support page for the right key. We could not read Lenovo’s Novo button page in full, so confirm the steps for your model.

Test the Keys

1. Press the arrow keys and see whether the menu highlight moves.
2. Try Enter, Esc, and Tab.
3. Try the keys that fail in Windows.

If the keyboard works here, the physical keys and their connection are working at a basic level, and a driver or setting in Windows is more likely. We found no manufacturer page that guarantees this, and a few keys, such as special function keys, can behave differently in the BIOS.

If the Keyboard Is Dead in the BIOS Too

If the keys fail here, Windows is not the cause. A failed keyboard, a loose connection, liquid damage, or a motherboard fault becomes likely. iFixit lists a keyboard cable fault and motherboard damage among the causes, and Dell recommends contacting support for hardware faults.

Use an External Keyboard to Compare

Plug in a USB or wireless keyboard. iFixit says that if a USB keyboard shows the same symptoms, the problem is likely software. If the external keyboard works in Windows and the BIOS while the built-in one does not, the built-in keyboard or its cable is the likely culprit.

Rule Out Software and Performance Problems

If the keys work in the BIOS, check for software causes next. Our guide on Why Is My Laptop Slow? Causes and Fixes explains how to check Task Manager and find overloaded systems, because iFixit lists operating system overload as a cause of delayed or doubled keystrokes.

You can also read Microsoft’s official Windows performance support page for general Windows health checks.

2. Turning Off the Windows Filter Keys Setting

Filter Keys is an accessibility feature that can make a working keyboard seem dead or slow. It is worth checking before you open anything.

What Filter Keys Does

An ElevenForum guide describes Filter Keys as an option to control the keyboard repeat rate and ignore repeated keys. In practice, it can disregard brief or accidental presses, so quick typing may seem to miss letters. We found no Microsoft page that gives a full description.

Check the Setting

1. Press Windows + I to open Settings, or use the on-screen keyboard or the mouse to open it.
2. Select Accessibility, then Keyboard.
3. Find Filter keys and turn it off.
4. Test the keyboard in a text box.

The Shortcut That Turns It On

The same guide says that holding the right Shift key for eight seconds can turn Filter Keys on, with a beep and a prompt. That means a Filter Keys problem can start by accident. If your keyboard became slow right after a long Shift press, this is the likely cause.

What Filter Keys Does Not Explain

Filter Keys ignores repeated keystrokes, so it does not explain a key that types many characters. Look at a stuck key, debris, or software instead. A dead keyboard that is also dead in the BIOS is not a Filter Keys problem.

Apple Laptops

Filter Keys is a Windows feature. On a Mac, accessibility keyboard options live in System Settings, and general health checks are in Apple’s official Mac optimization guidelines. That page covers storage, memory use, and Disk Utility, not keyboard faults.

3. Reinstalling the Keyboard Driver in Device Manager

If the keyboard works in the BIOS but not in Windows, a driver reinstall is the next step. Dell and Lenovo both document this fix.

Open Device Manager

1. Right-click the Start button and choose Device Manager.
2. Expand the Keyboards category.
3. Look for an entry such as Standard PS/2 Keyboard or your laptop’s built-in keyboard entry.

Many laptops list their built-in keyboard under that PS/2 name, which is general knowledge, not a quote from a manufacturer. Names differ by model.

Uninstall and Restart

1. Right-click the keyboard entry and choose Uninstall device.
2. Restart the laptop. If the keyboard is dead, use a mouse, a touchscreen, or an external keyboard.
3. Let Windows reinstall the driver during startup.

Dell says to uninstall each keyboard entry, restart, and let Windows reinstall the drivers. Lenovo says to reboot and let Windows install the driver, and it also suggests checking Lenovo’s support site for updates and rolling back a driver after a recent update.

Check for Driver Updates

After the restart, check your laptop maker’s support page for a keyboard or chipset driver for your exact model. Install only drivers from the maker, not from unknown sites. If keys still fail, run the keyboard troubleshooter in Windows settings.

Check for Software Interference

iFixit lists a faulty program and malware among possible causes. Remove any app you installed just before the problem began, and run a malware scan with your security software.

What a Driver Fix Cannot Do

A driver reinstall cannot repair a broken keyboard, a loose cable, or a spilled-on circuit. If the keys are dead in the BIOS, skip this section.

4. Power Reset for the Embedded Controller

Some laptops lock up their input chips after a power glitch. A hard reset drains stored power and sometimes clears these lockups. This is often called an embedded controller reset, and we found no manufacturer page that ties it to keyboard faults.

Dell’s Hard Reset Steps

Dell’s hard reset article gives these steps for laptops with a removable battery.

1. Shut the laptop down.
2. Unplug the AC adapter and remove the battery.
3. Unplug attached devices, such as USB drives, printers, and webcams.
4. Hold the power button for roughly 15 to 20 seconds.
5. Reconnect the AC adapter and battery, then power on.

Dell says this drains residual power that the capacitors on the system board can hold, and it does not affect personal files. Dell’s article is about laptops that will not turn on or boot, so it is a general reset, not a keyboard-specific fix.

If Your Battery Is Not Removable

Dell says that if the battery is nonremovable, you should see its separate real time clock (RTC) reset article. Other brands have their own steps, so check your maker’s support page for your model. Do not open the laptop to disconnect the battery unless your maker’s guide says to.

Check the Power Side

A flaky power supply can cause odd behavior across the whole laptop. If your laptop also has charging trouble, read Why Is My Laptop Not Charging? Common Causes and Permanent Fixes to check the adapter and battery.

Check Heat as a Side Factor

We found no manufacturer source linking heat to keyboard failure, so treat this as a precaution. If your laptop runs hot while you type, read Why Is My Laptop Overheating? Common Causes and Permanent Fixes for safe cooling steps.

5. Cleaning Dust and Debris From the Keys

If only some keys fail, debris under the keys is a common cause. iFixit lists dirt and debris under the keys as the first cause on its keyboard page.

Clean Safely

1. Shut the laptop down, unplug it, and disconnect all cables.
2. Check between and under the keys for crumbs or dust.
3. Blow the debris out with compressed air.
4. Wipe the keys with a soft microfiber cloth.

Dell says to turn the laptop off, blow out debris with compressed air, and wipe the keys with a soft microfiber cloth. It also says to avoid harsh chemicals. Lenovo adds that you can gently turn the laptop over to dislodge debris.

About Isopropyl Alcohol

iFixit says to wipe the switches with isopropyl alcohol, at least 90 percent, and let the keyboard dry before restarting.

Dell says to avoid harsh chemicals, so the two sources differ. If you use alcohol, use a barely damp swab on the key edges only, keep the laptop off, and let it dry fully. We found no manufacturer source for any spray angle.

Clean Fan Vents While You Are There

While the laptop is off, check the vents for dust, because dust can also build up under the keyboard area.

Our guide on How to Clean a Laptop Fan: Complete Step-by-Step Guide shows the safe steps for vents and fans.

If Liquid Got In

Dell says to power off right away, tilt the laptop to drain as much liquid as possible, and clean the keyboard with a soft microfiber cloth. Then let it dry for at least 24 to 48 hours in a warm, dry place and avoid using it until it is dry. iFixit says liquid residue on the motherboard can need a technician or a replacement board.

If Keys Still Fail

If the cleaned keys still do not type, the keyboard or its cable may be damaged. An external keyboard works as a stopgap while you arrange service. If the keyboard problem came with a screen problem too, such as lines or flicker, see Laptop Screen Lines: Causes and How to Fix Them, because a damaged laptop can show faults in more than one place.

Before You Contact Support

1. Note the model and serial number.
2. Write down which keys fail and whether they fail in the BIOS.
3. Note any spill, drop, or recent update.
4. Back up your files.
5. Describe any liquid exposure honestly. Technicians can usually tell.

Dangerous Mistakes That Can Permanently Ruin Your Keyboard Board

• Prying up keys with a knife or screwdriver. The small plastic parts under each key can break, and the key may not snap back.
• Pouring liquid onto the keyboard. Water or alcohol can run into the circuits. Use a barely damp cloth or swab only.
• Using a hair dryer on high heat. Heat can warp the plastic and the layers under the keys.
• Turning on a laptop that just got wet. Power can short wet circuits. Shut it down and let it dry.
• Tilting a wet laptop upside down for long periods. Drain the liquid, then rest the laptop so air can flow, as Dell describes.
• Pulling the keyboard cable without a guide. The connectors are small and break easily.
• Installing drivers from unknown sites. Use your laptop maker or Windows Update only.
• Opening a laptop under warranty without checking terms. A DIY repair may affect your coverage.

Frequently Asked Questions

Why is my laptop keyboard not working?

Common causes are a software setting, a driver problem, dirt under the keys, liquid exposure, or a failed keyboard or cable. The BIOS test and an external keyboard help you tell them apart.

How do I type if my laptop keyboard is not working?

Open the On-Screen Keyboard from Settings > Accessibility > Keyboard, or plug in a USB or wireless keyboard. Both work as a stopgap.

Can Filter Keys make my keyboard seem broken?

Yes. It can ignore brief or repeated keystrokes, so typing may feel slow or unresponsive. You can turn it off in Settings > Accessibility > Keyboard.

Should I reinstall the keyboard driver?

Yes, if the keyboard works in the BIOS but not in Windows. Dell and Lenovo both say to uninstall the keyboard in Device Manager, restart, and let Windows reinstall it.

Is a keyboard problem covered by warranty?

It depends on the cause. Liquid damage and physical damage are often treated differently from a defect, so check your brand’s terms.

Disclaimer: This article is for general educational and informational purposes only. It compiles official input device diagnostic concepts from verified manufacturer service frameworks. Laptop keyboard assemblies handle complex multi-layered conductive trace ribbons. Always prioritize contacting authorized manufacturer service centers or certified repair specialists to execute physical internal components or hardware keyboard replacements.