What is the sudden black screen of Apple 7plus?

There are many reasons for the sudden black screen of Apple 7plus, which are generally divided into software or hardware problems. First, exclude the software:

1, press and hold the Home key for 6-8 seconds, and exit any? The program that stuck the iPhone.

2. You can press and hold the power button and the volume down button (home button before the 7th generation) for about 10 second at the same time, so that the machine can be turned off and turned on hard until the white Apple logo appears.

3. If you press the power button and the volume reduction button at the same time, can you still crash? what's up iPhone？ If it is solved, please plug in the power and press the second key at the same time. It should be noted that if your current mobile phone is automatically turned off because the battery runs out, the screen will be black? If yes, please charge the mobile phone, and then restart it when the power reaches more than 5%.

4. Generally, you can connect the iphone(USB) to the computer and press HOME at the same time. The power key 10 seconds or so will lead to the recovery option? . Press "Restore OK" to restore iphone7.

5. If all these can't be solved, is it necessary to make the ultimate meaning? : DFU mode (professional auxiliary solution)

Many local shops have limited technology and will say that the motherboard or cpu is broken. Actually, it's very general. Here, I will give you a popular science.

1, the motherboard is a big concept, consisting of dozens of small chips, including: cpu processor, baseband, power amplifier, power ic, touch screen ic, wifi module, etc.

2. The core chip is cpu processor, which is similar to the brain of a machine.

4. Common faults include short circuit, desoldering and no current. The general treatment scheme is re-welding or flying line, disassembly, etc.

6. The cost varies according to different situations. The average chip is about 200.

It is unscientific to ask you to change the motherboard when there is a problem with the motherboard. The following picture shows the black screen crash caused by the short circuit of the motherboard display chip under the magnifying glass during maintenance: