The mobile phone has encountered saliva when playing with the child, and the screen has been black w

It may be that the child's saliva dripped into the phone and burned out the hardware. But it may also be that there is a problem with the mobile phone itself, it is recommended to go to the regular after-sales service for inspection, and it can also be repaired free of charge during the warranty period

That's right, Brother Liang, Brother Liang wants to take a house photo, and if you put it in Dali, it will be fine, and the rice will be fine if you put it for half an hour.

Method: 1. Some models have the function of double-clicking to turn off the screen, please confirm whether the phone has a black screen after double-clicking the screen.

3. It is possible that the software is incompatible with the mobile phone and causes a black screen, it is recommended that you go to the app store - management - application update - detect and update the mobile phone software.

Added Content: Reasons for the Black Screen of the Phone:

1. Mobile phone crash memory problem: Under normal circumstances, when the mobile phone stores too many things, many friends can feel that the mobile phone is running too slowly, and when their mobile phone is occupied by 80% of the memory that can be driven, it may crash.

2. The problem of the second contact of the mobile phone crash: This is the loosening of the contact of the mobile phone screen, which is not a big problem, but it can directly lead to the black screen of the mobile phone, which is difficult to find and can only be found after a lot of tests, which is generally caused by the mobile phone being bumped.

3. Mobile phone crash three battery problems: It is common for many mobile phones to have a black screen after using it for a long time, the main reason is that the effective use time of the mobile phone battery is 1 year, or it is three years but there is a problem in one year, and excessive use leads to the aging of the mobile phone's battery and insufficient voltage.

4. The problem of four conflicts in mobile phone crash: There are many applications for smartphones nowadays, but there are some software that are born with conflicts, which can also lead to a black screen, so the black screen after installing a lot of software is basically this reason.

5. The problem of mobile phone crash and five flashing: Many people are keen to brush the phone and use a better system, in fact, some system mobile phones are not very supportive, and there is also a complete flash, which leads to the inevitable black screen when using it in the future.

The phone screen does not light up and cannot be turned onHow to deal with it:

1. First confirm whether the battery of the mobile phone is sufficient, and connect the mobile phone to the original charger for about 20 minutes before trying to turn on the operation;

2. Force restart the phone, the method of force restart of each model:

Press and hold the top round button for more than 10 seconds to force restart the phone (for NEX 3);

FunTouch OS and later models: Press and hold the "Power button" + "Volume Down button" at the same time for more than 10 seconds;

FunTouch OS previous models: Press and hold the "Power Button" for more than 12 seconds;

Please click the link to view the operation method of force restart for specific models.

English Recovery Firmware Recovery Tutorial:

5. Follow the steps"3'Enter the recovery mode to try the double clear operation (Note: Double clear will clear the phone data, please operate with caution).

After entering the recovery mode, select "Clear Data", then select "Wipe Cache Partition" and "Wipe Data Factory Reset", and select "Reboot System Now" after the double clearance is completed.

6. If the above operations are invalid, it is recommended to bring your mobile phone to the customer service center for processing.

Follow these solutions:

1. Press the power button home button for 15 seconds to force a restart.

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3. Don't have too many apps in the background.

Hammer Technology: Hammer Technology is a company that manufactures mobile Internet terminal equipment, and the company's mission is to use the spirit of perfectionism to create first-class digital consumer products (mainly smart phones) with user experience and improve people's quality of life.

The phone won't turn on, it is recommended that you try the following methods to solve it:

1. Confirm whether the battery of the mobile phone is sufficient, and connect the mobile phone to the power supply to charge for a period of time before trying to turn on the operation;

2. Press and hold the power button for 10 seconds to try to restart the phone;

3. Press and hold the lock screen button and the volume plus button at the same time for 15 seconds to try to enter recovery mode, and select "Restart" after entering recovery mode.

If the above methods still can't be turned on, you need to send the mobile phone to the local vivo after-sales service center for testing and processing, the after-sales service center address can be checked by vivo official website, find vivo official website, and then click on the service-outlet query, and query the after-sales address of your province and city according to the prompts.

If it's hardware, it's a problem with the screen.,Flash the software.,Flash the machine first.,If you don't display something, change the screen.。

Mine is that the screen shows the words "can't charge".

After the mobile phone gets into the water, you should remove the back cover immediately, and it is very important to remove the battery! Then disassemble the phone card and remove the memory card.

Then immediately dry the moisture on the outer surface, if you can disassemble the machine, you can disassemble it and blow it with a hair dryer, to ensure that the motherboard, the surface of the screen is completely free of moisture, and the distance should be far away when blowing, do not blow in one place alone.

If the inside of the phone is dirty, you can wipe the motherboard and the soaked place with anhydrous alcohol, and if it falls into dirty water, use anhydrous alcohol to clean the inside of the phone, mainly the motherboard and the display.

At this time, you should turn on the electric blanket, put the mobile phone screen down on the electric blanket (no battery), and then cover it with a quilt and dry it overnight.

If the above methods do not work, then you can only send it to the repair shop for repair!

1.No matter what kind of water the phone falls into, you should remove the phone battery directly as soon as possible (instead of pressing the power off button)!

2.Use undusty napkins, cotton balls, cotton swabs, etc. to absorb all the water that can be wiped off outside.

3.If it is dropped into clean water, you can clean the phone with anhydrous alcohol, because the alcohol volatilizes quickly, and the water on the circuit board can be volatilized together (provided that you have anhydrous alcohol). If it falls into the sewage, it should be cleaned immediately, and the visible dirt should be cleaned first, and the impurities attached to the components should be brushed off with a brush.

4.Use a hair dryer to swing over a long distance to dry the moisture on the surface of the machine. (Be careful not to blow too close or to one place for a long time).

5.Use an electric blanket to bake for another night and you're ready to go!

If you are using a Huawei phone, we recommend that you do the following:

1. Please try to place your phone in a dry and ventilated place and use a paper towel to blot the water stains on the surface of your phone.

2. If the phone is turned on, press the power button to turn it off; If your phone is turned off, don't try to turn it on.

3. Please take out the SIM card and microSD card.

4. Take your phone to a Huawei customer service center as soon as possible to avoid unnecessary losses.

Precautions: 1. Do not move or shake the mobile phone frequently after entering the water, so as to avoid the spread of moisture inside the mobile phone.

2. Do not bake with a hair dryer or stove after entering the water, so as to avoid the liquid being blown into the inside of the mobile phone and damaging the mobile phone at high temperature.

3. Some mobile phones can be turned on and used normally after simple treatment, but the mobile phone is composed of precision electronic components, and there is a hidden risk after water ingress, so it is recommended not to try to turn it on.

4. During the after-sales maintenance process, data may be lost.

Here's how to do this:

1. Try and hold the "Power Button" on the top of your iPhone to see if it happens.

2. Please try to press and hold the "Power Button" and "Home Button" at the same time, and keep the holding time at least 10 seconds.

3. Connect your iPhone to a power source. Then press and hold the "Power Button" and "Home Button" at the same time, and keep the holding time for more than 10 seconds.

4. It may be a hardware failure, and it can only be used for hardware fault detection.

What to do if the iPhone has a black screen, what to do if the iPhone can't be turned on, everyone will encounter a more or less crash and black screen when using the Apple iPhone phone. Under normal circumstances, the black screen of crash is caused by the software system, which can be solved by some manual operations. Here are some methods that are used to deal with the black screen of Apple phone crash in daily life.

There are four ways to do this:

First, try pressing and holding the Power button on the top of your iPhone to see if it happens.

Try to press and hold the "Power Button" and "Home Button" at the same time for at least 10 seconds.

Connect your iPhone to a power source. Then press and hold the "Power Button" and "Home Button" at the same time, and keep the holding time for more than 10 seconds.

It may be a hardware failure, and it can only be used for hardware fault detection.

The system fails, but it can be brushed back, and there is a great risk in flashing, if you are not a professional maintenance personnel, it is recommended that you take it to repair.

This is also the case with my current mobile phone, what is the reason?

In addition to hardware failures, in general, the reason for the sudden black screen of the iPhone is caused by the firmware system itself, or some third-party applications that are incompatible with the system.

First, try pressing and holding the Power button on the top of your iPhone

If pressing and holding the power button does not make your iPhone turn off or restart, then try to press and hold the "Power Button" + "Home Button" at the same time for more than 10 seconds.

If neither of the above methods work, please connect your iPhone to a power source. Then press and hold the "Power Button" + "Home Button" at the same time for more than 10 seconds.

Finally, if it doesn't work, it may be a hardware failure, please go to Apple's local after-sales service for hardware fault detection.

Vivo phone can't turn on the BAI machine solution:

1. Press and hold the DU power button.

10 seconds to force zhi to restart the DAO phone.

2. Try charging.

For 20 minutes, press and hold the power button for 10 seconds to try to turn on (the phone is completely out of power and then charged without any prompt).

3. When the phone is turned off, press and hold the volume up button and the power button at the same time for 3 to 4 seconds after the vivo phone logo appears.

Let go of the button to enter the recovery mode, first select Wipe Data Factory Reset, select Wipe Cache Partition after completing the waiting interface, and then select Reboot System Now to restart the phone immediately.

4. Take it to after-sales maintenance.

The reasons why the phone won't turn on are roughly divided into hardware and software problems.

1. Hardware problems: generally mainly due to the design defects of the hardware itself, the damage of the hardware, improper operation, etc. For the design defects of the hardware itself, the mobile phone often crashes, there is no way to solve it, but to send the mobile phone to the customer service center for maintenance.

If the hardware is damaged, it can also lead to frequent crashes. Mobile phone is a precision electronic product, in which the circuit must be in a more stable environment to work normally, if the mobile phone often works in a humid environment or by the outside strong vibration, it may crash, for example, sometimes we accidentally drop the mobile phone to the ground, the mobile phone may die. Therefore, we must treat mobile phones kindly and try to handle them gently; Also, try not to use your phone in a humid environment.

Usually, if we operate the mobile phone improperly, it will also cause the mobile phone to crash, especially when we are sending text messages, if the speed of the key operation is too fast or the short message bombardment is continuously in a short time, resulting in the mobile phone CPU load is too large, and the heat generated by the CPU cannot be dissipated in a short time, so it will cause the mobile phone to crash. In addition, there are other factors that cause crashes due to hardware problems, such as aging hardware, too bad environment for using the phone, etc.

2. Software issues.

The main reason is that there is a fatal bug in the software design of the mobile phone, which causes the crash. When the phone runs the program, a command error will occur, a bit like an illegal operation in the computer, and there may be a crash.

Solve such a crash can be solved by software upgrade, now the major mobile phone manufacturers have customer service centers to provide free software upgrade business, in the upgrade to solve some software bugs, reduce the probability of crash. It is best to go to the customer service center to upgrade the software of the mobile phone, and if you do the upgrade yourself, please make a backup in advance, so as not to prevent the software from being restored after the mobile phone upgrade fails.

In fact, it is as normal for a mobile phone to crash as a computer, as long as we treat it correctly, there will not be so many people complaining that their mobile phone is dead again. But if your phone crashes frequently, you have to pay attention to it, and it is best to send your phone to the customer service center for maintenance, which is the best solution.