Why can t the phone turn on without plugging in the charger?

1. If you can't turn on the machine, the biggest possibility is that it can't be turned on due to insufficient power. Check to see if the plug is plugged in properly and confirm that the phone is charging.

2. If the power is exhausted and there is no response at the beginning of charging, it is mainly due to excessive battery consumption, which needs to be charged for a period of time, and can be turned on only after the power is restored to about 4%.

3. If it is charged for a long time, it still cannot be turned on, see if the socket is not plugged in and not charged, if it is charged, suspect that the battery is damaged, please go to the after-sales inspection and repair.

The same goes for my phone. When it was fully charged, he unplugged the socket and his phone turned off. Later, I went to the store to fix it, although I don't know what the problem is, but it may be that the phone is old, and the battery is a little problematic.

It is very likely that the tail plug of your mobile phone is broken, and it may be that the battery is not in good contact, this problem needs to be detected, and it is more difficult to solve it yourself by going to the customer service warranty or going to the repair point for repair.

According to common sense, it is the phone battery that is broken. Try changing the battery.

It's nothing more than a battery problem or a problem with your phone's motherboard.

1. It is recommended to replace the battery or remove the battery for universal charging.

Charge. and wipe the metal contacts with an eraser (if the battery is not removable.

Please return directly).

2. If the battery is replaced or the battery functions normally.

You need to repair the motherboard of your phone! (It is recommended to go to an official repair shop for repairs).

It is estimated that the battery is broken. Why don't you try wiping the copper piece of the battery with an eraser.

If it doesn't work, then. Let's change it.

Another scenario is: Your phone's battery is not charging -

What is the reason why the phone shuts down without plugging in.

1. There is no electricity。If you use up all the battery power, the charge needs to be charged to 5% before it can be turned on normally. So in this case, please let the phone charge for a while before trying to turn it on.

2. Software malfunction。If you are sure that the current mobile phone battery is sufficient, but it cannot be turned on normally, there may be a problem with the mobile phone software system. At this time, you can try to press the home button and power button on the home screen of your phone at the same time until the screen is lit up and there is a display.

3. System crash。If none of the above solutions work, and you see an iTunes connection screen on the screen of your iPhone 7, it means that the phone has entered recovery mode at this time. When this happens, the only way to do this is to restore the system for your phone.

Routine maintenance of mobile phones

Generally, we will have an idea that it is better to charge the battery power of the mobile phone after all the power is discharged, which is basically true, because most of the rechargeable batteries we used in the past are nickel-metal hydride batteries, and nickel-metal hydride batteries have the so-called memory effect, if you do not discharge and recharge, it will lead to a rapid reduction in battery life. That's why we don't use the last drop of power before we start charging.

However, most of the current mobile phones and general IA products use lithium batteries, and lithium batteries do not have the problem of memory effect. If you still wait until all the electricity is used up before charging, it will make the chemicals inside the lithium battery unable to react and reduce the lifespan. The best way to do this is to charge it when it's okay and keep it at its best at all times, so your battery will last a long time.

Causes: Incompatible third-party software, system crash caused by phone rooting, phone hardware damage, etc.

Here's how: Method 1:

Double clear by entering recovery mode.

1.In the power-off state, press and hold the power button and volume + buttons of the phone at the same time.

2.Release the keys when the screen lights up and wait for the recovery mode to enter.

3.Use the Volume+ and Volume—keys to adjust the bright bar to "Wipe Data Factory Reset", i.e. "Clear Data Restore Factory Settings", and press the Power button to confirm.

4.Use the Volume+ and Volume—keys to adjust the light bar to "yes, delete all user data" and press the power button to confirm.

5.Wait for a while until the screen appears, select "Reboot System Now" to restart your phone, and press the power button to confirm.

6.Wait for your phone to reboot into the system.

Method 2: Enter fastboot. Ways to get into fastboot:

In the shutdown state, first press and hold the "home button", then press and hold the "volume down button" and then press and hold the "shutdown button", and then let go when the boot screen appears, you can enter fastboot. Connect your phone to the computer and flash a complete system package. (Please find a professional to flash the machine).

Method 3: If this is still the case, enter the after-sales process and detect the fault of the mobile phone.

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: the schematic diagram of the control circuit is outside the power supply IC.

The test is carried out on the test point of the perimeter circuit to see if 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.

7. If it is a copycat mobile phone, then I estimate that it can't be turned on because the chip inside is burned, or some of the small parts inside are loose, but this situation will only appear if you drop it, the chip burns may be because you charge it for too long, burn the chip, if the battery has electricity, that is these aspects, if it is a brand-name mobile phone, such as Nokia, Motorola. These situations are rare, unless it is artificial, if it is a brand-name smartphone, and it is not used improperly, it is a software problem, it may be a system crash, or because of the mobile phone poisoning caused by software damage, generally this can only go to the maintenance office, however, I think the biggest possibility is caused by static electricity, it is recommended that you do not open the blind repair, or go to the maintenance office!

It is suggested that you can judge the situation by following the following methods that will help you solve the problem:

1.Please confirm whether the battery is charged, it is likely that the battery is too low to turn on, it is recommended to use the standard charger + data cable to charge for 20-30 minutes before trying to turn on;

2.If it still can't be turned on after charging, it is recommended to plug and unplug the battery several times, and then turn it on to try again. If there are multiple spare batteries, it is recommended to try to replace them and then try to turn them on.

You can also use an eraser or alcohol (industrial use) to clean the battery metal shock and connectors to see if there is any improvement;

3.If it is in a black screen and cannot be turned on: If you plug and unplug the battery (the battery is charged) many times and replace the battery, and the battery cannot be turned on, if it is in the black screen state, it is not excluded that there is an abnormality in the power supply IC and other components, and it is recommended that you go to the local site for specific detection and processing;

If it is the former, you can press and hold the power button (about ten seconds) until it restarts, if it is the latter, you have to wait until it is charged enough to turn on the power, if none of the above then your phone may be a hardware problem and need to be repaired.

First, there is a problem with the display screen, second, the mobile phone is not on the battery, and third, the mobile phone has suspended animation.

Summary. What should I do if my phone doesn't charge and I can't turn it on, hello! Hello, I'll help you solve this problem!

The steps are as follows:1Press and hold the power button for more than 10 seconds to see if you can force it to turn on.

If you are able to turn on your computer, please back up your important data and perform a factory reset or upgrade to the latest software version. 2.If you can't force it to turn on, please check whether the phone has power, there will be a charging indication when plugged in when the power is empty, it may not turn on immediately when it is just charged, please continue to charge for a period of time, and then try to turn it on.

What should I do if my phone doesn't charge and I can't turn it on, hello! Hello, I'll help you solve this problem! The steps are as follows:

1.Press and hold the power button for more than 10 seconds to see if you can force it to turn on. If it can be turned on, please back up the important information of the spring socks and restore the factory settings or upgrade the latest software version.

2.If you can't force it to turn on, please check whether the phone has power, there will be a charging indication when plugged in to the power supply in the empty power state, you may not be able to turn on the phone immediately after just charging, please continue to charge for a period of time before trying to turn it on. 3.

What should I do if the phone turns off when I unplug the charger.

What should I do if the phone turns off when I unplug the charger, hello! Check it from two aspects: 1. The mobile phone battery is out of the prepared question, it is very likely that the battery is charging but it has not rushed in at all.

So the power is unplugged, and it will automatically shut down due to the lack of power. Just change the battery. 2. For the problem of data cable, it is good to use a good imitation stove data cable.

The battery is seriously aging and does not store power, and it is recommended that the landlord replace the battery should be able to solve the problem; Finish.

If you are consulting about an HONOR mobile phone that is connected to the charger, the mobile phone does not respond, the battery charging icon is not displayed, and the charging cannot be charged. You can follow the following methods to determine the cause of the problem:

1. It is recommended to use the standard charger for charging.

It is recommended to use the charger and charging cable of the mobile phone to charge it. Non-Honor official chargers and cables may not be compatible with the phone, resulting in the phone not charging.

2. If the phone has not been used for a long time.

If the phone has not been used for a long time, or the phone is not charged in time after the low battery is turned off, the phone battery is over-discharged, and it takes more time to activate the battery, it is recommended to charge the phone for more than 30 minutes to see if the phone responds.

3. Please replace the charger and data cable that can be charged normally, and cross-check whether the charger and data cable are faulty.

4. If the charger and data cable are normal, but the phone still cannot be charged, it may be a malfunction of the phone. It is recommended to bring the mobile phone, the original charger, the original data cable and the purchase voucher, go to the nearby service center to test, if the mobile phone can not be turned on, and the data has not been backed up before, the data may be at risk, if the mobile phone can be turned on, it is recommended to back up important data, QQ and WeChat and other third-party applications are backed up separately. Open the official website of Honor, click on service support, find the service store query, you can query the nearby Glory World and authorized service center, it is recommended to contact the service center in advance before going to the service center, determine the business hours, and facilitate your travel

The mobile phone can be plugged into the charger to turn on, but the battery can not be charged usually there are reasons under the book:

1.Aging phone battery: If the phone battery has been used for a long time, it may experience wear and tear and aging, resulting in failure to charge properly. It is recommended that Qi Pai replace the battery with a new one.

2.Dust clogging of the charging port: If there is dust or debris inside the charging port, it may hinder normal charging, it is recommended to use a cotton swab or air blow to clean the charging port.

3.Damaged power manager: Damaged power management chips on some mobile phone circuit boards can also cause charging failures. You need to find a professional after-sales repair center for repair.

If none of the above methods work, it is recommended to go to a professional after-sales maintenance center for testing and processing.

If you are using an OPPO phone that does not charge (no charging symbol), the troubleshooting method is as follows:

1. It is recommended that you restart your mobile phone and replug the digital-analog lead cable.

2. Try to replace the charger and data cable as soon as possible to see if it is caused by damage to the charger or data cable;

3. Update the system version of the mobile phone, upgrade the mobile phone to the latest version and check whether it is restored.

If the above investigation still does not solve the problem, it is recommended to back up your personal data, bring the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and processing.

The phone can't be turned on, and the charging is useless, so you can try it from the following aspects:

1. Press and hold the power button (8-10 seconds) to see if you can enter the boot interface, if you can turn on, it means that it is dead.

2. If you still can't turn on the charging and there is no response, try to charge for a long time to activate, charge for more than 30 minutes, if the charging indicator light is on, you can turn it on. (The forced boot button method of each brand of mobile phone is different, depending on your own mobile phone brand and model).

3. Replace the data cable and charging head to eliminate the problem of data cable and charging head.

4. If there is a spare battery, the replacement battery can be turned on and charged, if it can't be, the system program or hardware of the mobile phone has a problem, and it will be sent to the after-sales service for maintenance and testing.

Methods and steps for reinstalling the mobile phone system:

1. Do a good job of backing up personal data, as long as you do a good job of backing up contacts, folders, important software and **. The above backup can be done with a professional backup software.

2. The battery is sufficient, which is very important.

3. On the computer side, flash the software, connect the mobile phone according to the requirements, press and hold the power button with one hand, and press and hold the volume button with the other hand. Wait for two minutes and your phone will restart.

5. Organize the desktop of the phone and get root permissions. Remove unnecessary programs. <>