What s going on with a keyboard malfunctioning and what causes a keyboard malfunctioning?

Has your keyboard ever failed? How to solve the keyboard failure? There are many kinds of keyboard failures, so today I will introduce some common keyboard failures and solutions.

One: The numeric keypad on the keyboard is out of order.

This is the lowest level mistake that many novice friends will often make, generally a desktop keyboard, resulting in the failure of the keyboard numeric keypad (0123456789) keys Most of the reason is that we turn off the numeric keypad, you can see if the numlock key is turned on, corresponding to a numeric keypad light on it, press the numlock key on the light to turn on the numpad.

There are also some notebook novice friends who often ask why the letter keys on the right part of my notebook keyboard are indeed numbers instead of letters, which is very tangled! In fact, this is because the number keys of the notebook are combined with the letter keys, when the number keypad is turned on, part of the letter keys on the right are arranged into number keys, mainly because the notebook keyboard is relatively small, and the manufacturer has set up an intelligent switching function.

The solution is as follows:

If only the keypad is locked, then press and hold the fn+numlk keys at the same time to switch and vice versa. Another point is that novice friends will often be unmistaken, the letters are all capitalized, this is because the capital letter key function is turned on, and you only need to press "caps lock" to cancel"button to switch to normal.

Two: some keyboard keys on the keyboard fail, which is a key failure without any regularity.

Caused by the failure of some keys of the keyboard, most of this situation is the failure of the internal circuit board of the computer keyboard, this phenomenon is generally due to the dirt on the road board or conductive plastic, so that the two can not be connected normally. Other factors are also possible, such as: keyboard plug damage, faulty wiring, damaged motherboard, CPU not working properly, etc., but they are not the main cause.

1.Disassemble the keyboard. Note that when opening the keyboard, be sure to turn the button side (that is, the side we operate) down and the circuit board up, otherwise the conductive plastic on each key will fall off one after another, causing trouble for your repair.

2.Open the circuit board, the circuit board is generally made of soft plastic film, engraved with key lines, with a concentration of more than 97% alcohol cotton (75% medical alcohol cotton can also be used, because I have used it, but it is best to use high concentration of alcohol cotton) gently ** road board scrubbed twice. Take care of the key failure part of the circuit several times.

3.Check the conductive plastic of the failed part of the button, and if there is a large amount of dirt accumulated on the upper area, use alcohol scrubbing as well. Assuming that the conductive plastic is damaged, then the author suggests that you can replace the conductive plastic on the infrequently used keys to the damaged part, although this "tear down the east wall to make up the west wall" measure can not make the keyboard play all the functions, but at least can extend the life of the commonly used keys.

4.Clean up the dirt in the inner corners of the keyboard and the tools are available.

The keyboard is our most commonly used input device, in the process of computer use, the most used part is the keyboard, computer keyboard key failure is a common problem, causing keyboard key failure There are many reasons, how to solve this failure? Here is an introduction to the solution to the computer keyboard key failure.

Causes and solutions to the failure of computer keys and stool plate keys:

1. The keyboard interface is loose and the contact is poor, which will also cause the keyboard keys to fail, so you can plug and unplug the keyboard again. We can use a multimeter to detect whether the computer keyboard is damaged.

2. Check each key on the keyboard, it is possible that one keyboard is pressed, and if it does not bounce back, the other keys will not respond.

3. There is dirt on the circuit board or conductive plastic inside the keyboard, so that the two can not be connected normally, and it will also cause the failure of the keyboard buttons, and the specific solutions are as follows

1.Disassemble the keyboard.

Note that when opening the keyboard, be sure to button the keyboard facing down and the circuit board up, otherwise the conductive plastic on each key will fall off one after another, bringing trouble to the repair work.

2.The circuit board is a film made of soft plastic, which is engraved with the key cables, and the circuit board is gently scrubbed twice with alcohol cotton (more than 75% medical alcohol cotton). The circuit of the keyboard key failure part can be wiped several times.

3.Check the conductive plastic of the failed part of the key, if there is too much dirt on the surface, it should also be scrubbed with alcohol. If the conductive plastic is damaged, it is recommended to replace the conductive plastic on the infrequently used keys with the damaged part, so as to at least extend the life of the commonly used buttons.

4.If there is dirt in the inner corner, you can use a brush, a small brush, etc., be careful not to push too hard, and move gently.

5.Check whether the welding module has virtual soldering or desoldering, if so, it is best to go to the repair shop and ask the maintenance master to help weld it.

6.Wait for the alcohol to evaporate and dry, and then install the keyboard.

The keyboard is not expensive, so much trouble is too much, don't put it and just change it to a new keyboard.