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l32s3211 turns black as soon as it turns on.

1. A black screen on a mobile phone is one of the common faults that are often encountered in mobile phone maintenance.

There are usually two types of black screens: one is a black screen during use, and the other is

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Black screen in standby mode. Here are some basic causes and solutions for black screens.

2. The black screen during use is mostly caused by

third-party software that you downloaded

yourself. It is rare that the machine comes with this kind of software. Condition. It can also be subdivided into two types: one is that the software itself has problems, the software itself is not stable, or it does not match the mobile phone system. This is very difficult. It’s easy to solve, just uninstall

and

; the second one is the conflict between software and software

. This solution is a little more troublesome and requires one software and one software. Software installation and uninstallation experiment

Find out which software is the problem. If you find it

just uninstall it and the problem will basically be solved.

3. The screen is black during standby. Let’s talk about the standby principle first.

The principle of standby is that most candy bar machines have a power-saving circuit design: the mobile phone has a long time

If no button is detected

The trigger signal will

automatically turn off the screen, that is, standby. When needed

use the mobile phone and activate the power-saving circuit by pressing a button , and then the screen lights up.

4. The reason for the black screen is often

reflected by the delay of the screen trigger circuit.

That is to say, the mobile phone system has issued a command to light up the screen but Due to circuit delay, the successful result was not sent

The screen did not light up successfully, but the mobile phone system thought it was already lit, thus causing a black screen.