Dairy powder HS code references

How to unlock the black screen status of iPhone As one of the most popular smartphones today,Dairy powder HS code references its powerful functions and stable system are favored by users. However, sometimes we will encounter some problems, such as the screen turning black when using the iPhone, which brings us a lot of trouble. So, how to unlock the black screen status on iPhone?Let's take a look at it together. I. How to judge whether the iPhone screen is black? First of all, we need to confirm whether the iPhone screen has really turned into a black screen state. There are several situations that are easy to cause misjudgment, such as: 1. The screen brightness is adjusted to the minimum, and the user thinks it is a black screen state. Two. Enter the lock screen state, but the screen is still on, and the user thinks that it has not entered the black screen state. 3. Due to long-term use, the iPhone goes into hibernation. At this time, you need to double-click the Home button to exit the lock screen interface and enter the password to unlock it. If the above situation is excluded, if the screen is still unresponsive, you can try the following methods to solve it. II. How to unlock the black screen status of iPhone? 1. Force restart. If you encounter the black screen of the iPhone and no response, you can pressPress the power button and the Home button for about 10 seconds at the same time. At this time, the screen will turn black, and you can release the two buttons. Then, wait for a few seconds and press the power button again. If the Apple logo appears, it means that the forced restart is successful. This method usually solves some small problems. The mobile phone will automatically restart, but the situation has not improved. You can try to enter DFU mode. Two. DFU mode DFU mode is the abbreviation of Device Firmware Update Mode, that is, the device firmware upgrade mode. This mode is usually used to solve more serious faults, such as black screen unresponsive, unable to start up normally and other problems. DFU mode will turn off the operating system of the iPhone, so you can enter DFU mode regardless of whether the screen is damaged or not.It should be noted that before operating in DFU mode, you must back up the data in time. The specific operation is as follows: (1) Connect the iPhone and the computer. ( 2) Press and hold the power button and the Home button at the same time, and press and hold for about 10 seconds. ( 3) Release the power button and continue to hold down the Home button until the computer prompts. ( 4) At this time, iTunes will pop up an iPhone that needs to be restored. Select Restore to update the firmware and restart automatically after the download is completed. DFU mode sometimes shows asynchrony, which may be caused by data damage. At this time, professional data recovery can be used to eliminate the fault. 3. If the above methods cannot solve the problem of the city service center, you can consider going to the Apple after-sales service center for help, and they will provide you with professional solutions.At the same time, you can also contact Apple customer service to get some help and advice. III. How to prevent the black screen of iPhone? 1. Avoid using it for a long time; 2. Charge reasonably, do not use non-original chargers; 3. Regularly clean up the cache and garbage inside the mobile phone to avoid storing too much data; 4. Pay attention to moisture-proof and heat-proof, and avoid the mobile phone being exposed to moisture or high temperature environment. In summary, it is very troublesome to make the black screen of the iPhone unresponsive. We can take some measures to solve it, such as forced restart, DFU mode, after-sales service, etc. At the same time, we need to reduce the time of using the iPhone and pay attention to moisture-proof and heat-proof.

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