Most of the laptop keyboard does not work are caused by minor problems. You can check them according to the following steps: 1. Check Num Lock, external keyboard interference and keyboard layout settings; 2. Restart the computer to solve temporary problems; 3. Update or reinstall the keyboard driver; 4. Check for physical damage or dust accumulation. Most cases can be solved by restarting or updating the driver. If it is invalid, consider the hardware issues and contact professional repairs.

If your laptop keyboard suddenly stops working, don't rush to send it to repair. This situation is often caused by minor problems, such as driver exceptions, system setup errors or temporary software conflicts. Priority is given to troubleshooting simple causes and then considering hardware failures .

Below are some common situations and corresponding solutions to help you quickly determine where the problem lies and try to fix it.

1. Check if it is a simple connection or locking problem

Sometimes the keyboard does not respond because some basic settings are misoperated:

• Num Lock or Function Key Lock : When some laptop keyboards are turned on, some keys will become numeric keypads, which look like "failed". Press the Num Lock key to try it.
• External keyboard interference : If you plug in an external keyboard, the system may use it by default. Unplug and see if the keyboard can be used.
• Keyboard layout settings error : Enter system settings to check whether the input method and keyboard layout are normal. For example, in Windows, you can adjust it in the "Language" option.

Tip: You can try pressing Win Ctrl 空格to switch input method, which can sometimes wake up the keyboard response.

2. Restart the computer and try

This is one of the easiest ways to eliminate it. Many temporary problems can be solved by restarting:

• System stuttering causes keyboard driver to load failed
• A program occupies or conflicts with keyboard resources
• Power management settings abnormal

After restarting, observe whether the keyboard returns to normal. If it still doesn't work, further troubleshooting may be required.

3. Update or reinstall the keyboard driver

The keyboard driver is damaged or outdated, which will cause the keyboard to be unresponsive or some key presses to fail:

Windows user operation steps:

1. Press Win X and select Device Manager
2. Expand the Keyboard option
3. Right-click on your keyboard device (such as standard PS/2 keyboard, Synaptics, etc.)
4. Select Update Driver or Uninstall Device
5. After uninstalling, restart the computer, the system will automatically reinstall the driver

If you are not sure which one is the primary keyboard device, you can try uninstalling one by one and test it after restarting.

4. Check for physical damage or dust accumulation

If you have tried all the above methods and still can't do it, it may be a hardware problem:

• Spilling liquid : accidentally sprinkling water or other liquid onto the keyboard may cause internal short circuits or corrosion.
• The key is stuck or dirty : After using it for a long time, dust, food debris, etc. may be stuck under the key, affecting the contacts.
• The motherboard interface is loose : Some keyboards are connected to the motherboard through cables, and if the cables are loose, they will also cause failure.

You can try to clear the gaps in the keyboard with air blow, or gently pat the keyboard to see if it can recover briefly. However, if it is an internal circuit problem, it is recommended to contact after-sales service or professional maintenance personnel to deal with it.

Basically these are the investigation methods. In most cases, restarting or updating the driver can be done. If it really doesn't work, then consider the hardware issue. Don't disassemble the machine from the beginning.

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