Why can't I type numbers on the numeric keypad on my keyboard?

Cause: 1. The "Num Lock" key is not turned on. The function of this key is to switch between locking/unlocking the numeric key input; press the "Num Lock" button and the indicator light will light up. 2. Whether it is a keyboard with a PS/2 interface or a USB interface, there is a possibility of program confusion during use; just unplug the keyboard interface and restart the computer. 3. The keyboard is damaged, just replace the keyboard.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

When many users use computers, they find that the "numeric keys" on the computer keyboard cannot be typed. The following article will talk about the reasons why the keyboard cannot type numbers, and the solutions.

Cause 1: The "Num Lock" key is not turned on

Whether it is a keyboard component or a laptop keyboard, most keyboard numbers The key area is divided into two parts, one is the numeric keys above the 26 English letters, and the other is the numeric key area on the right. If the numeric keys on the numeric keypad are malfunctioning, it is most likely caused by turning off the "Number Lock Key".

There is a button called "Num lock" in the numeric keypad. Some keyboards will also configure an indicator light for this button. If you find that the numeric keys are not working well, press this button and the indicator light will light up. At this point the numeric keys can be used normally.

The function of the Num Lock key is to switch between locking/unlocking numeric key input.

Cause 2: Program confusion

Whether it is a PS/2 interface or a USB interface keyboard, during use , there will be the possibility of program confusion.

When users use keyboards with these two interfaces and find that the digital area cannot be used normally, the first thing to do is to unplug the keyboard interface (you can also shut down and unplug it), and then restart the computer.

If it is a USB interface, it supports hot swapping and can be plugged in after booting. If it is a PS/2 interface, it needs to be plugged in when the computer is turned off.

Follow this series of procedures, and the numeric keys on the keyboard can be used normally, but don’t forget to turn on the “Num lock” lock key first. The round interface of the keyboard is a PS/2 interface, and the square interface is a USB interface. As shown below:

Language 3: Keyboard damage

No matter what kind of keyboard it is, there will be multiple keys inside the keyboard. Contacts, if the contacts undergo oxidation, water ingress, or circuit aging, it will cause some keyboards to malfunction. Taking "water ingress" as an example, this may not happen when water first enters, but water conducts electricity and will cause The keyboard motherboard and circuit are short-circuited. As the use time is extended, problems will gradually occur. When encountering this situation, you can first use the troubleshooting method to determine the problem. You can plug it into another user's computer to test. If the problem still exists, basically It can be determined that the keyboard is damaged and can be replaced directly. As shown below:

Expand knowledge:

Except for not turning on the "Num lock" indicator light, most The problems are all caused by system program or hardware failure. Few people use PS/2 interface keyboards anymore. They all use USB interface keyboards. Although they seem to be "driver-free", it does not require a driver. It is just integrated in the keyboard. It's just a computer system problem. If it's a system program problem, unplug it and plug it in again, restart the computer, and it can be used normally. But if it's a hardware failure, it can't be repaired no matter what method you use. Just change the keyboard.

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