There may be various reasons why a computer keyboard suddenly cannot be used, and the following are some common reasons and their solutions: 1. Connection problems
Wired keyboard: Check if the connection cable is securely plugged in to ensure a secure connection. If the connecting wire is loose or broken, it needs to be reconnected or replaced.
Wireless keyboard: Check if the battery is sufficient and if the connection method is correct. Meanwhile, ensure that the receiver is plugged into an available USB port on the computer. If the battery is low, it needs to be replaced in a timely manner. 2、 Driver issues
A computer keyboard requires proper driver support to function properly. If there is a problem with the driver program, the keyboard may not function properly. You can check the status of the keyboard driver through the device manager. If any abnormalities are found, you can try updating or reinstalling the driver. 3、 Key lock
Some keyboards have special function keys such as Num Lock, Caps Lock, and Scroll Lock. These keys will lock the corresponding functions when pressed. If the keyboard does not respond, it may be due to one of the function keys being accidentally locked. Try pressing the corresponding function key to unlock. 4、 Operating system issues
Software issues in the operating system may also cause the keyboard to not respond. Try restarting the computer to refresh the system and resolve any temporary issues. If the problem persists, you can try starting the computer in safe mode to eliminate potential conflicts with third-party software. 5、 Hardware malfunction
Hardware failures such as damaged internal circuits, worn keys, or loose connection wires can all cause the keyboard to be unusable. If other solutions are ineffective, you can try connecting the keyboard to another computer to determine if the keyboard itself is malfunctioning. If it is a keyboard malfunction, the keyboard may need to be replaced. 6、 Malicious software
Some malicious software may interfere with the normal operation of the keyboard. Run antivirus software for a comprehensive scan to ensure that the computer is not infected by malicious software. If malicious software is found, promptly remove it and restart the computer. 7、 Physical damage
The keyboard may be physically damaged, such as immersion in water, falling off, etc. If the keyboard does not respond in these situations, it may be due to damage to the keyboard's circuit board or switch. In this case, it may be necessary to replace the keyboard or repair the hardware parts of the keyboard.
When the computer keyboard suddenly becomes unusable, troubleshooting and resolution can be carried out from aspects such as connection issues, driver programs, key locking, operating system problems, hardware failures, malicious software, and physical damage. If the problem cannot be solved on its own, it is recommended to seek professional help.