Reasons why Xiaomi mobile phone has a black screen and cannot wake up the screen. Attachment: Solution to Xiaomi mobile phone where the black screen cannot light up when making calls.

php editor Xiaoxin brings you an article about the reasons and solutions for the black screen on Xiaomi mobile phones that cannot wake up. As a popular smartphone, Xiaomi phones occasionally encounter the problem of a black screen that cannot be woken up, which is especially troubling when making calls. This article will introduce in detail the reasons why Xiaomi mobile phone has a black screen and cannot wake up the screen, and provide solutions to help everyone solve this problem and ensure normal use of the phone while improving user experience.

Many times when people use their mobile phones to make calls, when the mobile phone is close to the ear, the screen will automatically turn off to prevent the face from accidentally touching the mobile phone screen, resulting in some unfriendly situations. In fact, when you make a call , blocking the sensor above the mobile phone screen will turn off the screen. This is the role of the distance sensor. Nowadays, almost all smart phones are generally equipped with such a sensor, so it is not only easy to happen on Xiaomi phones, but also on some other mobile phones. Even if the screen is not blocked when making a call, it will not light up until the other party hangs up. Just cut it off. Another situation is that when the phone unlocks the screen, a prompt not to cover the orange area will appear. In fact, this is also related to the distance sensor.

So what is a distance sensor? The distance sensor is also called a displacement sensor. The distance sensor is usually on both sides of the mobile phone receiver or in the groove of the mobile phone receiver, which facilitates its work. Distance sensing is mainly a machine that uses various components to detect physical changes in an object and converts the changes into distance to measure the distance displacement from the sensor to the object.

Having said so much, how should we solve the problem when it arises? First, check whether the sensor on the screen is blocked by foreign objects, such as whether there is a sticker, or whether the protective case is too wrapped. If your phone has a protective film, you can take it off and take a look after using it for a long time. The distance sensor is generally located above the screen of the mobile phone, usually on the left or right side of the earpiece. The front panel is dark and difficult to see. You can pay attention to the entire front panel and clean it.

Xiaomi mobile phones can enter hardware detection to detect whether there are hardware problems with the distance sensor. On Xiaomi phones, enter *#*#64663#*#* on the dialing interface. For some Redmi phones, you need to enter *#66*# to enter the hardware detection mode. Swipe up and down to select the distance sensor test. When entering the interface, you can see that there is button to start calibration. If you block the distance sensor with your hand or don't block the sensor with your hand, and the number above does not change when you start calibrating, then there is most likely a problem with the distance sensor, such as the phone being soaked in water or bumped, or it may have been disassembled. The sensor hood has fallen off, which may cause hardware problems. In this case, it is recommended to go to after-sales service for repair.

If the sensor is blocked or not blocked, the number above will change accordingly, usually the two numbers 5 and 0. This proves that there is no problem with the distance sensor hardware, as long as the sensor is not blocked. , click Start Calibration in the middle, wait a few seconds and the words Calibration Passed will appear at the bottom, proving that the sensor is calibrated correctly. There is no need to perform other operations at this time, just click the Home button to exit the desktop. At this time, try to dial the distance The sensor will generally work normally.

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