Many friends use (desktop) computers, found that the computer keyboard suddenly failed, press the light on the keyboard did not have any reaction, this issue of the article teaches you how to deal with such problems, as well as determine the cause of the failure.
1. Check the line
The most common cause of this type of failure is the line problem caused, most keyboards are using USB interface, easy not to be damaged, but some users like to move the keyboard back and forth, which will lead to the wear of the data cable and the keyboard interface, once the line has poor contact or breakage, there will be keyboard failure, and the keyboard light is not lit. As shown in the following figure:
In this case, you can focus on checking the location of the data cable and the keyboard connection, check whether there is damage, if necessary, you can cut open the outer protective skin to confirm, if you confirm that the line is damaged, you can use the solder gun to renew, but in general, it is not recommended to continue, you can buy a new data cable re-soldering online, and you can also directly replace the keyboard.
Second, the interface failure
Most keyboards use USB interface cable, if the keyboard is found to be malfunctioning, and the keyboard light is not on, there may be a problem at the interface (computer USB interface), some users like to insert the USB keyboard in the front panel of the computer chassis, with the increase of service life, the USB interface of the front panel will have insufficient power supply. As shown in the following figure:
In this case, you can directly unplug the keyboard cable, and then plug it into the rear panel of the computer chassis, as far as possible in the first or second USB interface position, after plugging in the keyboard will return to normal.
Third, the connection line interface problem
Although most keyboard interfaces are USB interfaces, there are also some keyboard interfaces that are PS/2, which do not support hot swapping, and the shape of such interfaces is obviously different from the USB interface. As shown in the following figure:
As shown in the figure above, the general purple interface represents the keyboard interface, the keyboard of this type of interface is more stable than the USB keyboard during use, but the only drawback is that once the computer (chassis) vibrates or moves during use, it will cause the keyboard to fail, at this time you must close the computer, and then unplug the keyboard interface (purple), and then reinsert, and then restart to use normally.
Fourth, the keyboard problem
If the keyboard used by the user is a wireless keyboard, then it may be caused by insufficient keyboard power supply, there are two kinds of wireless keyboard power supply systems circulating on the market, one is to use independent battery power, the other is to use integrated battery power, no matter which kind of power supply mode of the keyboard, once the keyboard power is too low, the keyboard will fail, and the keyboard light can not be turned on. As shown in the following figure:
In this case, you can charge the keyboard or replace the battery, and then try again, and it will return to normal.
Fifth, the receiver problem
Some users use a wireless keyboard that uses infrared transmission technology, which requires a small receiver to be inserted into the USB interface. As shown in the following figure:
If there is a problem with the receiver, it will also lead to keyboard failure, the keyboard light can not be turned on, encounter this problem, you can plug it into other computers to test, if the problem still exists, and the keyboard does not have a warranty period, you can return to the factory for repair, replacement, but if the warranty period is passed, you can only replace the receiver or replace the entire keyboard.
Sixth, system problems
Although most of the keyboards can now be used directly on the computer, without the need to install a driver, also known as "driver-free", but driver-free does not mean that there is no need for a driver, but the computer system directly integrates the keyboard connection needs to connect the driver. As shown in the following figure:
If the driver files of the computer system are missing, viruses, Trojan horses, etc., it will also lead to keyboard failure, the keyboard light can not be turned on, in this case, you can also reinstall the system and try again, but this situation rarely occurs, you need to determine whether there is a possibility of this situation according to the actual situation.
Conclusion: No matter which kind of keyboard the user is using, when encountering problems, do not panic, first determine whether there is a problem with the keyboard itself, you can unplug it and plug it on other computers to test, if the keyboard can be used normally, then you can determine that the problem is on the computer, and then according to the above several situations one by one test, you can find the cause of the failure, find the cause, the problem is also good to solve.