The situation when the keyboard and mouse on a laptop suddenly stop working can unsettle even an experienced user. It’s especially frustrating if this happens in the midst of important work or before a project is due. In 80% of cases, the problem is solved without contacting a service center - it is enough to correctly diagnose the cause and apply proven recovery methods.

This article will help you figure out why input devices refuse to function even when your laptop is on and booting. We will consider both software failures (drivers, viruses, OS conflicts) and hardware failures (damage to cables, connectors, microcircuits). Special attention is paid to the specifics of different operating systems - Windows 10/11, macOS And Linux (Ubuntu, Mint).

1. Primary diagnosis: what to check first

Before you disassemble your laptop or reinstall the system, perform some basic checks. They will take no more than 5 minutes, but will help eliminate obvious causes.

Step 1: Reboot the Laptop. It’s trivial, but it helps in 30% of cases. If the keyboard does not respond, press the power button for 10 seconds to force shutdown, then turn the device on again. On MacBook use combination Control + Command + Power.

Step 2: Checking external devices. Connect a USB mouse or keyboard (if there is a working port). If they work, the problem is in the built-in devices. If not, the USB controller or motherboard may be faulty.

  • 🔌 USB port: Try connecting the mouse to a different connector. On some laptops (eg Lenovo ThinkPad) ports may shut down when overheated.
  • 🔋 Charging: Make sure your laptop is connected to the network. Some models (HP Pavilion, Acer Swift) block USB ports when the battery is low.
  • 🖥️ Monitor: If the screen does not respond to the brightness keys (Fn + F5/F6), the problem may be with the graphics driver and not the keyboard.

Step 3: Test in BIOS/UEFI. Reboot the laptop and enter the BIOS (usually the keys F2, Del or Esc). If the keyboard works in the BIOS, but does not work in the OS, there is a software problem (drivers, viruses). If it doesn’t work there either, there’s a hardware fault.

📊 How often do you have problems with your keyboard/mouse?
  • Once a month
  • Once every six months
  • Less often
  • Never

2. Software reasons: drivers, viruses and OS conflicts

In 60% of cases the software is to blame. Let's look at typical scenarios and how to resolve them.

Driver failure. After updating Windows or installing new software, keyboard/mouse drivers may fail or conflict. Check their status:

  1. Open Device Manager (Win + X → Device Manager).
  2. Expand sections Keyboards And Mice and other pointing devices.
  3. If a yellow triangle is lit next to the device, right-click and select Update driver.

Viral activity. Some viruses (for example, Trojan.Win32.KillAV) block input devices. Perform a scan:

  • 🛡️ Windows Defender: Start → Settings → Update & Security → Windows Security → Virus Protection.
  • 🔍 Kaspersky/Virus Removal Tool: Download the utility from another device and scan your laptop in safe mode.

Program conflict. Utilities for controlling gestures (for example, Synaptics or ELAN) can block the mouse. Disable them via Autoload (Ctrl + Shift + Esc → Startup).

☑️ Checking for software reasons

Done: 0 / 4
⚠️ Attention: If after updating the drivers the keyboard stops working completely, use system restore point. Go to Control Panel → Recovery → Run System Restore and select the date when everything worked.

3. Hardware faults: from cables to motherboard

If software methods do not help, the problem lies in the hardware. Let's look at the most vulnerable components.

Keyboard cable. A common problem with laptops with detachable keyboards (Lenovo Yoga, HP Spectre). Signs:

  • 🔧 The keys work every once in a while or get stuck.
  • 💡 Keyboard backlight flickers or does not turn on.
  • 🔊 When pressed, a crunching sound is heard (the contacts are damaged).

Solution: disassemble the laptop (or contact service) and check the fastening of the cable to the motherboard. On models Dell XPS And MacBook Pro The cable often comes off after falling or pressing hard on the keyboard.

USB controller. If neither the built-in nor the external mouse works, the south bridge or USB hub may be faulty. You can check this like this:

  1. Connect the mouse to another device (PC, TV). If it works, the problem is in the laptop.
  2. Try booting from Live USB (eg Ubuntu). If the mouse does not work there either, the controller is faulty.

Motherboard damage. Worst case scenario. Signs:

  • 💥 The laptop does not turn on or turns off 5-10 seconds after startup.
  • 🔥 A burning smell appears or swollen capacitors are visible.
  • 🔌 All USB ports do not work, including Type-C.
⚠️ Attention: If you suspect damage to the motherboard, do not connect the laptop to the network without diagnostics - this can lead to a short circuit and complete failure of the device. Contact a service center with equipment for micro-soldering.
Symptom Probable Cause Solution
Keyboard works in BIOS but not in Windows Driver failure or filter driver (for example, from an antivirus) Reinstall drivers in safe mode
Mouse twitches, cursor jumps Moisture under the touchpad or sensor malfunction Dry the laptop in rice for 24 hours or replace the touchpad
Only function keys do not work (F1-F12) The cable or keyboard chip is damaged Replacing the keyboard or soldering contacts
USB ports show no signs of life The USB hub on the motherboard has failed Diagnostics in the service, chip replacement possible

4. Specifics of different operating systems

The algorithm of actions depends on the OS. Let's consider the nuances for each.

Windows 10/11:

  • 🔄 Reset input settings: Go to Settings → Devices → Mouse/Keyboard → Reset settings.
  • 🛠️ Troubleshooting: Enter in search Troubleshooting and select Equipment and devices.
  • 🔧 Table mode: If the keyboard does not work, use On-screen keyboard (Win + Ctrl + O).

macOS (MacBook Air/Pro):

  • 🍎 Reset SMC: Turn off the power, hold down Shift + Control + Option + power button for 10 seconds.
  • 🔄 Reset NVRAM: When loading, hold down Command + Option + P + R 20 seconds.
  • 🖱️ Safe Mode: Boot while holding down the key Shift - this will disable all third-party extensions.

Linux (Ubuntu, Mint):

  • 🐧 Checking kernel modules: In the terminal (if you have access) run: 
    lsmod | grep -E 'usb|hid'

    Missing lines with usbhid or hid_generic indicates a driver problem.

  • 📦 Reinstalling packages: 
    sudo apt-get --reinstall install xserver-xorg-input-libinput xserver-xorg-input-evdev
What to do if the keyboard does not work in Linux without a graphical interface?

If the system boots only into console mode (without GUI), connect a USB keyboard and run the commands: sudo nano /etc/default/grub → find the line GRUB_CMDLINE_LINUX and add the parameter i8042.nopnp. Then update GRUB: sudo update-grub and reboot.

5. Restoring work after a liquid or fall

Water ingress or shock are common causes of keyboard and touchpad failure. Act quickly to minimize damage.

If the laptop is dropped:

  1. Turn off the device and remove the battery (if removable).
  2. Check the housing for cracks. If there is deformation near the keyboard, the cable is probably damaged.
  3. Connect an external keyboard and check the response. If it works, the problem is in the built-in mechanics.

If liquid is spilled:

  • ⏱️ First 30 seconds: Immediately turn off the laptop, turn it over with the keyboard facing down, and shake off any liquid.
  • 🔋 Battery: Turn off the power and remove the battery (if possible). This will prevent short circuit.
  • 🌾 Drying: Place the laptop in a silica gel bag (from shoe boxes) for 48 hours. Do not use a hair dryer or rice as this will worsen the corrosion of the contacts..

After drying:

  • 🔌 Connect the charger and try to turn on the laptop. If the keyboard does not work, disassemble the device and clean the contacts with alcohol (90%+).
  • 🛠️ On models MacBook (2015–2019) the keyboard often breaks down Butterfly. Apple provides free replacement under the program Keyboard Service Program.
💡

If the keyboard works after a liquid spill, but some keys “stick,” use a special contact lubricant (for example, DeoxIT). Apply it carefully with a cotton swab, without pouring it inside the mechanism.

6. Alternative ways to control your laptop

If your keyboard and mouse are not working but your laptop is on, use these methods to diagnose.

On-screen keyboard:

  • 🖥️ Windows: Start → Accessibility → On-screen keyboard (or Win + Ctrl + O).
  • 🍎 macOS: System Preferences → Accessibility → Keyboard → Enable On-Screen Keyboard.

Voice control:

  • 🎤 Windows: Customize Speech recognition in Control Panel → Accessibility.
  • 🗣️ macOS: Turn on Siri or Voice control in System Preferences → Accessibility.

Remote control:

  • 📱 TeamViewer/AnyDesk: Connect from another device (phone, tablet) and control your laptop remotely.
  • 🖥️ SSH (for Linux): If SSH server is enabled, connect via network from another PC: 
    ssh пользователь@IP_адрес_ноутбука

Hardware buttons:

  • ⚙️ On some laptops (ASUS ROG, MSI) there is a button ROG Armoury Crate or Dragon Center, which opens the control menu without a keyboard.
💡

If none of the alternative methods work, but the laptop is turned on, there is a hardware problem (input controller or motherboard).

7. When to contact the service center

Not all breakdowns can be fixed on your own. Contact a specialist if:

  • 🔧 You disassembled the laptop, but found no visible damage, but the problem remained.
  • 💻 The laptop does not turn on or turns off a few seconds after starting.
  • 🔥 Traces of melting are visible on the motherboard or connectors.
  • 💧 Liquid got under the microcircuits (and not just on the keyboard).
  • 🔄 After all the manipulations, the keyboard/mouse is unstable (it turns on, sometimes it doesn’t).

The cost of repair depends on the model and nature of the failure:

Type of repair Average cost (₽) Deadlines
Replacing the keyboard cable 1 500 – 3 000 1–2 days
Cleaning from liquid (without replacing parts) 2 000 – 5 000 3–5 days
Replacing the keyboard (assembled) 3 000 – 10 000 2–4 days
Repairing a USB hub on the motherboard 5 000 – 15 000 5–7 days

Before visiting the service:

  1. Make a backup copy of your data (if the laptop turns on).
  2. Write down your laptop model and serial number (usually on a sticker on the bottom).
  3. Check to see if the manufacturer provides a warranty for the keyboard (for example, Apple or Dell).

FAQ: Frequently asked questions

❓ Why does the keyboard work but the touchpad doesn’t?

Most likely reasons:

  1. Touchpad disabled in settings (Settings → Devices → Touchpad).
  2. Driver failure Synaptics or ELAN. Reinstall it through Device Manager.
  3. Mechanical damage to the cable (often after a fall or strong pressure).
  4. Moisture gets under the touch panel.

On MacBook check the setting System Preferences → Mouse → Tracking.

❓ Is it possible to use a laptop with a non-working keyboard?

Yes, but with reservations:

  • Connect external USB keyboard (or Bluetooth if USB ports work).
  • Use on-screen keyboard (on Windows/macOS/Linux).
  • Set up voice input or gesture control (on supported models).

However, long-term use without repair is fraught with:

  • Dust/moisture getting into open connectors.
  • Exacerbation of damage (for example, oxidation of contacts).
❓ How to turn on a laptop without a keyboard?

The methods depend on the model:

  • Power button: On most laptops, holding it down for 1-3 seconds is enough.
  • Biometrics: On devices with Windows Hello (For example, HP Envy) you can turn on the laptop using your fingerprint.
  • Wake-on-LAN: If the laptop is in sleep mode, send a magic packet from another device on the local network.
  • Auto-start by timer: Set in BIOS (Power Management → Resume by Alarm).

If the power button does not respond, the problem is with the power supply or motherboard.

❓ Why did the mouse stop working after updating Windows?

Typical reasons:

  1. Incompatible driver: The update installed the wrong version. Rollback: 
    pnputil /delete-driver oem*.inf /uninstall /force

    (replace oem*.inf to the name of the problematic driver from Device Manager).

  2. Conflict with antivirus: Disable Kaspersky/Avast and check the mouse operation.
  3. HID service failure: Restart it via the command line: 
    net stop hidserv & net start hidserv

If the mouse works in safe mode, the software is to blame. If not, it's a hardware problem.

❓ How to check if the motherboard is at fault?

Signs of a motherboard failure:

  • Don't work all USB ports (including Type-C).
  • Laptop won't turn on or turns off after 5–10 seconds.
  • Appears blue screen (BSOD) with errors USBPORT.SYS or ACPI.SYS.
  • Doesn't work built-in webcam, speakers, microphone (general failure of controllers).

For diagnostics:

  1. Connect a known working USB mouse to another device - if it works, the problem is in the laptop.
  2. Check the voltage on the USB ports with a multimeter (should be ~5V).
  3. Look at the capacitors near the south bridge - if they are swollen, the board requires repair.