What s going on when your phone won t turn on? How to fix it

The mobile phone can not be turned on for many reasons, there is a battery and a motherboard, first charge it for a period of time to see if it is a problem with the battery, if it can't be turned on, it is the motherboard, you need to take it to a professional mobile phone repair shop to disassemble and check.

It may be that the screen is broken, the motherboard is burned, and the cause of the formation may be water ingress, falling to the ground and breaking the screen, etc. Finally, it is sent to the after-sales service for detailed inspection.

The iPhone itself is unstable, resulting in a black screen. This kind of black screen can be attributed to an unstable automatic shutdown, which is because the machine is of poor quality, resulting in shutdown for no reason. Because there is no big problem with the hardware, you can just press and hold the power button and wait for it to turn on.

The following describes how to troubleshoot if the phone fails to turn on:

1. Check whether the battery is too low.

After charging for 30 minutes with the standard charger and data cable, press the power button to see if there is a charging screen.

No charging screen: Please replace other chargers and data cables that can charge normally to confirm whether the charger and data cable are abnormal. If there is still no charging screen after replacement, it may be a fault of the mobile phone, it is recommended that you bring your mobile phone, charger, data cable, and purchase voucher to the customer service center for testing.

There is a charging screen: Please press and hold the power button to try to turn on, if it can't be turned on, please follow the methods below to continue troubleshooting.

2. Confirm whether the machine is damaged or liquid.

Do not turn on the phone after liquid inflow: If the phone has been automatically turned off, please do not try to turn it on, you can use a paper towel to absorb the liquid, and send the phone to the customer service center for testing as soon as possible.

Do not turn on the phone after the fall: There are unstable factors after the phone is damaged, it is recommended to send the phone to the customer service center for testing.

3. Force restart your phone.

Try force restarting your phone to see if it resumes, and check if the power and volume buttons are stuck in the case.

Force Restart Method:

Models released before September 2017 (models before x20): Press and hold"Power button"More than 12 seconds.

Models released after September 2017 and new models released later (x20 and later): Press and hold at the same time"Power button"+"Volume down key"More than 10 seconds.

NEX 3 NEX 3S: Press and hold the top round button for more than 10 seconds.

4. Repair the system.

Enter"System Repair Mode", and then tap"Install the system software"Enter"Networking updates to the latest version", click"OK"(It is recommended to connect the charger) - Connect to the available wifi, when the upgrade package is detected, tap"** and install"Update your phone's system.

Ways to enter System Repair Mode:

Models released before September 2017 (models before x20): Press Shutdown status"Power button"with"Volume up key"Enter recovery mode;

Models released after September 2017 and new models (X20 and later): Press Shutdown status"Power button"with"Volume up key"Enter fastboot mode, then enter recovery mode through the menu selection, select: install system software, and then select:

Networking updates to the latest version

NEX 3 NEX 3S: Press and hold the top round button for about a second in the shutdown state, then press and hold the volume up button to enter fastboot mode, press the volume down button to move to"Go to Recovery", press the power button to confirm to enter recovery mode.

5. Service center testing.

If the above methods fail to solve the machine problem, please bring your mobile phone and purchase voucher to the vivo customer service center for testing, enter the vivo official website vivo**app--my--service outlets or pay attention to WeChat*** "vivo customer service"-self-service-after-sales outlets, select provinces and cities to inquire about the service center information, it is recommended to contact in advance before going to avoid empty running, plan the itinerary reasonably, and travel safely.

Press the volume up button and the power disturbance Lu Kai button at the same time and don't let go. Wait until you see the pattern before releasing it. At this time, you can enter the recovery mode of the slow call phone. Press the volume up button to select Clear Data. Press the Power Confirmation button and wait for the data to be cleared.