The LG G4 phone is out of battery, the charging keeps showing zero percent, and it can t be turned o

The reasons for this could be:

1. The boot line is not normal

Use an external power supply to power the mobile phone, use the power meter to detect whether the indication has changed, if there is no change, it is likely that the power cord is broken or the power button is not in good contact.

2. The power supply circuit of the battery is abnormal

Use the external interface to power the 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 not normal

Test on the test point of the peripheral circuit of the power supply IC according to the circuit schematic diagram to see if the test value is normal.

LG G4 starts the line brush brush machine operation:

1. The phone enters flash mode.

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Second, open the device manager of the computer, after the com port appears an item starting with LG, you can proceed to the following steps, if it is not displayed, it means that there is a problem with the mobile phone connection or the driver is problematic, please check, the screenshot after the display:

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.

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!

If you are using a Huawei phone.

If your phone won't charge, you can try the following:

1.Please check the temperature of your phone.

If the temperature of the mobile phone is too high or too low, it may not charge properly, please make sure to charge the mobile phone in the environment of 0 35.

2.Please use an officially recommended charger for charging.

It is recommended that you use the charger and charging cable officially recommended by Huawei for charging. Non-Huawei chargers and cables may not be compatible with the phone, resulting in the phone not charging or charging slowly.

3.Please make sure that your phone has not been used for a long time.

If your phone has not been used for a long time, or you have not charged your phone in time after the low battery is turned off, it is recommended that you charge it for more than 30 minutes to see if the phone responds.

4.Please check whether the charger and device interface are abnormal.

When the charger and cable are damaged or the mobile phone charging interface has foreign objects or deformation, it may cause the connected charger to fail to charge or charge intermittently, please make sure that the charging interface is clean and free of deformation before vertical charging, and check whether the charger and cable are damaged, and you can replace other chargers to try.

If the above methods do not help you, we recommend that you back up your data in advance, such as QQ and WeChat, and other third-party apps (and back up them separately) and bring your phone, charger, data cable, and proof of purchase to a Huawei Customer Service Center near you for help. The relevant link is as follows: Repair service.

Make an appointment for service. Customer Service Center.

Generally, the charging cable or charging head is broken, or the mobile phone is broken.

Try a different thread.

Why can't LG mobile phones be charged, and they can't be turned on when they are charged, what's going on?

Why can't LG mobile phones be charged, and they can't be turned on when they are charged, what's going on? Hello dear, if the phone can't be charged, it is recommended that you try it according to the following operation methods:1

Turn off the battery, remove the battery, and use a cotton swab to wipe the battery and phone contact points. 2.Use the original charger to connect to the home power source for charging.

3.Replace the power outlet, try or change a data cable to connect to the charger for charging. 4.

If it cannot be charged by using a cable charger, if conditions permit, it will be missed to replace the hidden search battery or use the universal charger. If other charging equipment can charge the battery, it is possible that your cable charger is not in good contact and it is recommended to replace it. 5.

If the phone can be turned on normally, it is recommended to back up the data in the phone (such as contacts, multiple files, etc.) and restore the phone to factory settings. If the problem still exists according to the above methods, please bring the purchase invoice, warranty card and machine to the after-sales service center for inspection. I hope that I can help you.

Hello, if your phone is not plugged into the charger and shows charging, you can check the operation by the following methods:1Restart the phone or plug the data cable again to see if the wheel head improves2

It is recommended to try to replace it with the desktop theme that comes with the phone, some third-party theme design flaws keep displaying the charging icon. 3.Please confirm whether you are using a non-standard charger and data cable, as the use of non-standard chargers and data cables may not be compatible with the mobile phone, resulting in the abnormal display of the charging icon.

4.Please check whether there is any dirt in the charging port of the mobile phone, and it is recommended to use a dry soft brush to clean it up and try it. If the problem persists, we recommend that you back up your data in advance (third-party communication apps need to be backed up separately) and bring your mobile phone, charger, data cable and purchase voucher to the nearest LG customer service center for testing.

Reasons why the phone battery didn't charge when it was charging:

1.The mobile phone battery itself is already fully charged, and the battery will not be able to continue charging;

2.The mobile phone battery is over-discharged and the voltage is too low to have normal charging and power-on conditions. After charging for a period of time, it can be charged and turned on normally;

3.The phone's battery itself is damaged, so it can't be recharged.