After the phone has fallen, sometimes it is good, and sometimes it is turned on and turned off repea

The causes of phone crash are broadly divided into hardware and software issues.

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 restore the software 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.

Summary. Hello, I am very happy to answer for you what is going on when the mobile phone is turned off when it falls 1, after the mobile phone falls, the contact contact of the battery and the contact of the mobile phone are not in good contact, solution: take out the mobile phone battery, and then wipe it with alcohol, and re-put the mobile phone to see if it can be charged.

2. After the mobile phone is dropped, the internal structure inside is not in good contact, it is recommended to bring the relevant documents to the outlet for the engineer to test and repair. 3. The mobile phone battery is not in good contact with the metal contact point of the mobile phone, or the back cover is too loose. Workaround:

Wipe down the metal contacts and pad them with some sponge or something else.

Good. Hello, I am very happy to answer for you what is going on when the mobile phone is turned off when it falls 1, after the mobile phone falls, the contact contact of the battery and the contact of the mobile phone are not in good contact, solution: take out the mobile phone battery, and then wipe it with alcohol, and re-put the mobile phone to see if it can be charged.

2. After the mobile phone is dropped, the internal structure inside is not in good contact, it is recommended to bring the relevant documents to the outlet for the engineer to test and repair. 3. The mobile phone battery is not in good contact with the metal contact point of the mobile phone, or the back cover is too loose. Workaround:

Wipe down the metal contacts and pad them with some sponge or something else.

The screen is black, and when charging, it is charged but not turned on, and only the sound is heard.

The phone screen is black, but you can hear the sound, which means that the phone's display or the wiring associated with it is faulty. If the parts are not damaged, this type of failure can be repaired ......If a part is damaged, the damaged part can only be replaced.

<> phone dropped and automatically restarted Reason:

1. The battery compartment of the mobile phone is not tight enough, and a fall will cause the battery and the mobile phone contacts to be separated for an extremely short time, resulting in the restart of the mobile phone.

2. The electric board falls out at the same time as the mobile phone falls to the ground, causing the mobile phone to restart.

3. The phone may have a self-protection function, in order to ensure that the phone files will not be lost, so it will automatically restart.

The mobile phone is not a drop-resistant product, and the damage caused by different falling heights and landing angles may be different. If you use a vivo mobile phone, you can bring your mobile phone and purchase voucher to the customer service center for testing and processing, customer service center address: enter vivo official website vivo**app--my-service outlets or vivo official website web version--bottom down--service support--service network query--select provinces and cities to query the customer service center address.

It is recommended to contact ** in advance before going to avoid empty running, plan the itinerary reasonably, and travel safely.

There are several reasons why your phone has power but won't turn on:

1. The boot line is abnormal: use an external power supply to supply power to the mobile phone, use the electric meter to detect whether the indication has changed, if there is no change, it is likely that the boot line is broken or the boot button is not in good contact.

2. The power supply circuit of the battery is abnormal: use the external interface to supply power to the mobile phone, see if it returns to normal when it is turned on, if it is normal, it is determined that the power supply circuit of the mobile phone is abnormal.

3. The IC of the mobile phone power supply is abnormal: test the test point of the peripheral circuit of the power supply IC according to the circuit schematic diagram to see whether the test value is normal.

4. The system clock and reset of the mobile phone are abnormal: you can use the dual total oscilloscope to detect the CPU power supply of the mobile phone to check whether the waveform in the reset is correct.

5. Problems with logic circuits: that is, faults in the circuit version of mobile phones, which can generally be solved by repair welding.

6. Software conflict: The installed software does not match the system of the mobile phone, which may also cause the mobile phone to fail to boot, you can connect the mobile phone to the computer to delete the program.

The mobile phone was dropped and restarted after a while, this is an automatic restart phenomenon, automatic restart is generally divided into three reasons, one is hardware failure or poor battery contact, one is the installed software conflict, one is to run the program or too much cache, the solution operation steps are as follows; 1. Hardware failure or poor battery contact: This needs to be taken to after-sales testing or replacement of the battery. 2. There is a conflict in the installed software

Check whether it is in the use of a third soft beam will restart this situation, if so, it is recommended to uninstall it or ** new version to try, if you can't determine which software is causing it, you can back up the phone data after the rubber attack to restore the phone to factory settings. 3. Running programs or too many caches: When you usually use it, don't open too many background programs, and clean up the cache of your phone regularly.

I hope my answer is helpful to you, and finally I wish you good health and a happy mood again!

The reason why the phone will automatically restart after a drop: the SIM may be loose, and it will be fine to replug it.

A mobile phone, also known as a mobile phone, is a mobile phone that can be held in your hand. In the early days, it was commonly known as big brother because of its large size, and now it has developed into the 4G era. In April 1973, the American engineering and technical starvation "Martin Cooper" invented the world's first mobile phone to be promoted to civilian use, and "Martin Cooper" has since been known as the "father of modern mobile phones".

Until now, mobile phones have become a very important tool in people's lives, and they are as versatile as a Swiss army knife.

Types of mobile phones. Business cell phones.

Business mobile phones, as the name suggests, are mobile phone products that target business people or people working in state agencies. Mobile phones are available differently for people of different occupations and genders. Business phones are favored due to their powerful features.

Industry experts pointed out: "A good business mobile phone should help users not only achieve fast and smooth communication, but also complete business activities efficiently." ”

Video phone. Although the video phone is a type of mobile phone, it is mainly a mobile phone that focuses on the image function. The world's first camera phone was the J-SH04 manufactured by Japan's Sharp in November 2000.

Unsurprisingly, the camera used a CMOS image sensor for short, because CMOS was more power-efficient than the CCD image sensor used in digital cameras at the time. So that the phone's battery does not run out quickly due to the use of the camera. Pin pants back.

Learn mobile phones. Learning mobile phone is to add learning function on the basis of mobile phone, supplemented by mobile phone, "learning" is the main; Learning mobile phones are mainly suitable for pure junior high schools, high schools, universities and international students. The function must be an all-round teaching tool that integrates the learning of textbooks and practical textbooks, with the goal of "teaching".

It has an obvious auxiliary effect on learning; It can be carried with you and enter the learning state at any time, which is the value of being a learning mobile phone.