iPhoneXS inexplicably black screen crashed, where can I fix it?

Press the power button + home button at the same time.

Keep holding down. Until it is turned on.

Don't let go of any of the keys halfway through.

Apple XS suddenly went black and couldn't turn on the machine, there are two possible reasons:

1. Software Failure.

1. Try to restart your phone, I found that many people's force restart method is wrong, and the correct one is as follows.

1) Press the volume plus button first to release, 2) Press the volume down button to release.

3) Then press and hold the power button until the Apple logo appears on the black screen.

2. If it still can't be solved, it is estimated that it is a hardware failure

Generally, the reason for not turning on is the motherboard chip or board layer line problem, which needs to be detected to determine:

2. Detect all chips on the motherboard, including CPU, display chip, touch chip, power chip, battery and board line through the current instrument;

3. Check if one of them is blackened, short-circuited, or soldered. It is then repaired by chip transplantation technology.

Nowadays, many dishonest maintenance masters let users replace the motherboard if it is a motherboard problem.

The cost of replacing the motherboard is very expensive, in fact, you only need to repair some chips on the motherboard.

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.

I'm an apple repair master, so I'll talk about it.

The response to the black screen of the mobile phone xmax is generally divided into several situations, 1. The software and system are incompatible and stuck.

2. Problems with the screen or screen arrangement.

3.Problems with the motherboard display output chip.

First, you can press the volume up, then press the volume down, and then press and hold the power off button for 5 seconds. This kind of system problem can basically be solved in seconds, you can try it.

Second, the screen problem should be detected to see whether it is a cable or an inner screen, and the wire problem can be solved by pressing a few hundred small rows. If it's an inner screen, you have to change the screen, which is very expensive.

Third, the motherboard problem does not necessarily mean that the motherboard must be changed.

Motherboards are made up of hundreds or thousands of small chips, capacitors and resistors.

Including CPU, power chip, power supply chip, display chip, hard disk, and baseband circuit, you generally only need to find out the faulty chip to replace, and you don't need to replace the entire motherboard at all.

Many masters in small places don't understand, and when you encounter a problem with the motherboard, you will be asked to change the whole thing.

It's very unnecessary, the chip is only a few hundred smaller.

The motherboard is going to be 23 thousand. The following figure is the motherboard chip diagram.

If you don't know, you can ask me mine.

Press the volume up button, press the volume down button, press and hold the power button to force restart, if it can be opened, the phone is stuck, if it can't be turned on or the screen is black, it means that the inner screen of the phone is broken. You can only go to the after-sales service.

If the phone screen is black, it is likely to be caused by the inner screen of the mobile phone or the loosening of the CPU, especially the inner screen may be damaged, you can change the inner screen.

Reasons for the black screen of the iPhone:

One: The iPhone itself is a refurbished machine or other machine with quality problems, and there will be an unstable black screen under occasional circumstances, but it is not a damage to the screen.

Two: Entered Apple's DFU mode by chance, which is Apple's recovery mode.

Three: It may be that Apple's system won't boot.

Four: The hardware is damaged and the screen is broken.

Five: It may be caused by an internal conflict in the software you have installed. In serious cases, the screen will restart and so on. It is recommended to bring your mobile phone to the regular Apple Customer Service Center on the 8th Floor, Block B, East 3rd Ring Road, Chaoyang District, Jianwai SOHO, East Third Ring Road, Chaoyang District for inspection and maintenance.

You can try to force restart, Give this phone a **, if it can be connected, but it is still a black screen, it is estimated that the screen is broken and you need to change the screen to change the screen You must change the original screen to change the screen, it is best to have a warranty.

Several situations and solutions for the black screen of the Apple mobile phone and the solutions:

One situation where 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 second scenario. DFU mode is the mode in which the Apple system cannot be turned on if there is a problem, while entering the recovery mode can be recovered with iTunes. But the phone is fine, and it can't be turned on because it can't be turned on because it has entered DFU mode by mistake, but it's actually very easy to solve.

You only need to press and hold the power button and the home button at the same time and wait for the iPhone to react, generally for more than 10 seconds, if there is no response for tens of seconds, the following steps continue.

In the third case, you need to enter DFU mode, first of all, iTunes must be installed on the computer, and you can ** a new iOS system. Or restore files with a backup beforehand. Of course, during the recovery process, the computer can be connected to the Internet, and it can also be ****, but the wait is longer.

I'm an Apple repair engineer, so let me tell you about it.

iPhone XS black screen does not turn on or white screen fruit restart,1You can first remove the impact of system problems by force restarting, forcing a restart is actually similar to the forced shutdown method of iPhone 8, first quickly press Volume Plus and then let go, and quickly press Volume Down and then let go, 2If it still can't be solved after restarting, it is likely to be caused by a hardware failure.

Generally, there are many problems with the motherboard, and if there has been a drop or water before, the motherboard problem is not to replace the motherboard.

This kind of fee is very expensive, and a motherboard of X is more than 3000.

The motherboard is actually composed of dozens of chips such as CPUs, hard disks, and power amplifiers, and only need to replace the faulty chips to recover.

Instead of taking it for granted that the motherboard is broken and replaced with a motherboard.

As shown in the figure below, an experienced master will replace the burned power IC. Generally, you can re-enter the system.

For example, power supply ICs. It's only 23 hundred.

I have been doing mobile phone motherboard chip repair, and I know these very well.

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