What to do with the black screen of the Apple 4, what is the matter with the sudden black screen of

Have you ever tried pressing two keys together? If not, give it a try! It is to press the power on button and the back button together for two minutes!

After a while, it shows a sign that there is no power, and you can just charge it! If the battery is still charged, it can be turned on! If it still doesn't work, you have to disassemble the machine to see and check!

Some of them have broken batteries! It could also be an issue with the motherboard.

1.The black screen of the mobile phone is one of the faults that are often encountered in the maintenance of mobile phones, and the black screen can be divided into two types: one is the black screen in use, and the other is the black screen in standby.

Here are some basic causes and solutions that cause black screens. 2.Most of the black screens in use are caused by third-party software downloaded by yourself, and this situation rarely occurs with the machine.

It can also be subdivided into two kinds: one is that the software itself has problems, the software itself is unstable, or it does not match the mobile phone system, etc., this is very easy to solve, and it can be unloaded; The second is the conflict between software and software, which is a little more troublesome to solve, and requires a software to install and uninstall a software. If you find it, uninstall it, and the problem will basically be solved.

3.Black screen in standby, let's talk about the standby principle first, most of the straight board machines have a power-saving circuit design: the mobile phone can not detect the key trigger signal for a long time, it will automatically turn off the screen, that is, standby, when you need to use the mobile phone, a button will activate the power-saving circuit, and then the screen lights up.

4.The reason for the black screen is often reflected by the delay in the triggering circuit of the screen. That is to say, the mobile phone system has issued the instruction to light up the screen, but because the circuit is delayed, it does not send the successful result, and the screen is not lit successfully, but the mobile phone system thinks that it has been lit, so it causes a black screen.

What should I do with the black screen of my iPhone?

Have you ever tried pressing two keys together? If not, give it a try! It is to press the power on button and the back button together for two minutes!

After a while, it shows a sign that there is no power, and you can just charge it! If the battery is still charged, it can be turned on! If it still doesn't work, you have to disassemble the machine to see and check!

Some of them have broken batteries! It could also be an issue with the motherboard.

Workaround:

1. When you encounter the black screen of death of your iPhone, you can't turn it on, and there is no response, at this time, you can try to press and hold the power and home buttons on the home screen at the same time and keep them for more than 10 seconds. See if you can force a restart.

2. If the forced restart is successful, you can see an Apple logo on the screen afterwards. After the reboot is successful, it can be used normally.

3, of course, sometimes it may be because of the power out, resulting in automatic shutdown, no matter how you operate, you can't turn on the phone, when you encounter this situation, please connect your iphone to the power charger first.

4. If it is automatically turned off because of the lack of power, a battery icon will appear on the screen at this time.

5. In addition, the battery of the iPhone must be charged to more than 5% before it can be turned on normally, if the power is extremely low, please let it charge before turning it on.

6. If the above methods are ineffective, it may be a hardware failure of the Apple mobile phone, and it is recommended to send it to an Apple authorized after-sales service store for testing.

The main reasons for the black screen of Apple iPhone are as follows:

1. Apple itself is a refurbished machine or a machine with questionable quality, which is prone to unstable black screen situations.

2. Entered Apple's DFU mode by accident, that is, the recovery mode of Apple's mobile phone.

3. It may be caused by the failure of the Apple mobile phone system to start.

4. The internal hardware of the Apple phone is damaged or the screen is broken.

If the problem does not solve your problem, it is recommended that you bring your phone to an Apple customer service center for repair.

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 (customer service center 020-8362-1957).

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.

In addition to hardware failures, in general, the reason for the sudden black screen of the iPhone is caused by the firmware system itself, or some third-party applications that are incompatible with the system.

First, try pressing and holding the Power button on the top of your iPhone. If pressing and holding the power button does not turn off or restart your iPhone, try to press and hold the "Power button" + "Home button" at the same time for 10 seconds.

If neither of the above methods work, please connect your iPhone to a power source. Then press and hold the "Power Button" + "Home Button" at the same time for more than 10 seconds.

Finally, if it doesn't work, it may be a hardware failure, please go to Apple's local after-sales service for hardware fault detection.

It's the reason for the system of the phone itself!

It's best to find customer service to solve it for you

After all, you are newly bought, don't make your own repairs!

iphone4 is dead, what to do, the simplest trick is to press the "home" button + power on button together, wait for 15 seconds, the machine will automatically restart, this is Apple's "hard start", which is equivalent to the "reset" function.

However, after the reboot, it is better to check why it freezes, it may be unstable or conflicting software installed, or it may be an unknown bug in the system itself...Common situations are as follows:

Check your recently installed software or games, it may be that the recently installed software conflicts with Apple's system functions, resulting in a crash or restart, this kind of problem is relatively easy to solve, uninstall the recently installed software or games, and it will generally be OK.

Use some tools such as mobile phone assistant to clean up the junk of your phone and optimize the operation efficiency of your phone.

Hardware refers to the electronic components in the mobile phone such as the motherboard and the display, which must be repaired by professionals.

Press the power button + home for 10 seconds while connecting the computer and it will turn on ·· A common problem with IP4

The black screen is normal, try to press and hold the home button, turn off the phone with voice, plug in the computer if it doesn't work, use the computer to force it off, generally speaking, it will be good to turn it off and turn it on.

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Reason: 1. If the iphone4s has been jailbroken, it is likely that there are vulnerabilities in the jailbreak software.

2. The iPhone 4S has not been turned off for a long time, causing the battery to overheat.

Solution: 1. Press and hold the bottom back button to add the top power button, and the machine will restart.

2. Press the power button and home button together for 15 seconds.

3. If the iPhone 4S often has a black screen, you can try to restore the factory settings.

4. Link iPhone4s to iTunes for recovery.

5. After trying the above four methods, if the iphone4s has not responded, it is likely to be a hardware problem, and it was quickly sent to the service station for repair.

I now have this problem on my phone from time to time, it is a black screen, a black screen for no reason, just like shutting down, what button to press, the problem with the iphone can only be a software problem, not falling or touching, it can't be a hardware failure.