Hello, my Meizu note5 turned on after the black screen, but the phone number note is gone, and so is the SMS.

Black screen of mobile phone is one of the common faults in mobile phone maintenance. Usually there are two kinds of black screens: one is in use and the other is in standby. The following are some basic reasons and solutions for the black screen.

In use, the black screen is mostly caused by the third-party software downloaded by yourself, which is rare in this machine. It can also be subdivided into two types: one is that the software itself has problems, the software itself is unstable, or it doesn't match the mobile phone system, which is easy to solve and can be uninstalled; The second is the conflict between software, which is a bit troublesome to solve. It needs a software to install and uninstall it. If found, uninstall it, and the problem is basically solved.

Standby black screen, let's talk about standby principle first. Because most of the direct board machines have power-saving circuit design: the mobile phone will automatically shut down if it fails to detect the key trigger signal for a long time, which is standby. When you need to use your mobile phone, a button will activate the power saving circuit, and then the screen will light up.

The reason of black screen is often reflected by the delay of screen trigger circuit. In other words, the mobile phone system issued an instruction to light the screen, but because of the delay of the circuit, the screen was not successfully lit, but the mobile phone system thought it had been lit, which caused a black screen.