The 7p was playing, and suddenly it went black, and then it got better. What the hell is the cycle of this black screen?

11step by step reading

Test with external power supply. After plugging in the charging device, if it can be turned on, it is a battery problem, and you can buy a battery to replace it.

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If it's not a battery problem, then look at other hardware problems, such as broken screen and black screen caused by internal water. This must be sent for repair.

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IPhone puts the liquid touch indicator on the SIM card. After taking the card, if you see red or pink dots, it means that water has entered, which is usually white or silver.

Software problem solving method

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Try to restart the machine, press and hold the power button and volume button at the same time, so that the machine can be turned off hard, and then turned on until the white apple logo appears, and it will be OK.

Expand long figure

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If the method 1 doesn't work, please try to plug in the power supply and press these two keys at the same time, so as to detect whether the battery automatically shuts down because of sudden power failure.

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If the first two methods fail, it is time to enter the recovery mode of iPhone. Generally, you can connect the iPhone to the computer, and press the volume button and the power button at the same time 10 seconds or so, and the recovery option will appear. Click ok to restore apple iPhone7 plus.

Enter DFU mode

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You may have heard of the DFU mode of iPhone. The full name of DFU is Development FirmwareUpgrade, which actually refers to the mandatory upgrade mode of iPhone firmware. For example, when you downgrade the iPhone firmware, if there is an error, then when you restore or downgrade the firmware, you need to put your iPhone in DFU mode before you can completely downgrade it.