What happens to the black screen after Macbook Pro is connected to iPhone4? 35

Isn't it normal for you to use your phone??

This phenomenon means that there is a problem with your computer system and cannot boot normally, you can choose to reinstall the system, or you can choose to start the computer with the boot disk of the USB flash drive system, and then use the system repair function to repair it, and you can solve the problem.

The black screen of the notebook boot is generally due to the following reasons.

1.It may be that the power adapter is damaged and cannot be charged normally, you can try to replace the power adapter and charge it again.

2.Poor contact of the memory slot in the notebook will also cause a black screen, disconnect the power supply, open the back cover of the computer, take out the memory module, wipe the contact surface of the memory module with an eraser, and then put it back on.

3.Virtual soldering of the video memory of the laptop graphics card will also cause a black screen and need to be sent to the after-sales service.

1.If 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.If the IC of the mobile phone power supply is abnormal, test it on the test point of the peripheral circuit of the power supply IC according to the circuit schematic diagram to see if the test value is normal.

4.If the system clock and reset of the mobile phone are abnormal, you can use the dual total oscilloscope to check the CPU power supply of the mobile phone to see if the waveform in the reset is correct.

5.If there is a problem with the logic circuit, that is, the fault of the mobile phone circuit version, this problem can generally be solved by repair welding.

It may be that the battery of the mobile phone is too low, resulting in the mobile phone still not responding after turning it on.

Solution: Try connecting your phone charger and then turn it back on.

2. It may be that there is a malfunction in the mobile phone system, resulting in some functions of the mobile phone cannot be used normally.

Solution: Try to update the system of your phone, or back up your phone data and then restore your phone to factory settings.

During Mac OS X or later startup, you'll see Secure Boot in the sign-in window, even if it's normal automatic login. During Mac OS X to startup, you'll see "Safe Boot" on the Mac OS X boot screen.

Reset pram:

Shut down your Mac book.

Go to the physical store to fix the black screen, it may be that your screen is broken, or the system can't start, just find a professional to show you.

Reasons why your Mac computer keeps going black after turning it on:

1. The screen display is malfunctioning;

2. The internal hardware equipment is damaged or malfunctioning;

3. The system software is malfunctioning;

4. The computer is infected with malicious viruses. Workaround:

It can be solved by cleaning up the pram. When booting up, press and hold the four keys of Apple + Option + P + R, and let go when you hear four startup sounds.

When you turn it on, you hear a tick, press the shift key, and then let it go when you see the daisy wreath, enter safe mode, re-enter the system, and reinstall the Mac system.

This situation is obviously not an abnormal boot state.

You can take the machine to the after-sales service to test it, and if there is a problem, the after-sales service will help you deal with it.

Find a computer repairer, let him take a look at it for you, redo the system, and if it really doesn't work, return to the factory.

MacBookPro always has a black screen all of a sudden, which is caused by a wrong setting, and the solution is as follows:

1. First of all, when the Apple computer has a black screen, press and hold the home button and the power button of the ipad to restart the operation.

2. After booting into the desktop of the computer, click to select the settings option on the desktop.

3. Go to the settings and click to select the general options.

4. After entering the settings interface, select the software update option to enter the software update interface.

5. In the interface of software update, you can see the following figure, where you can update the system to the latest version.

I don't know what kind of mac you use, but I know that the Mac has a magnetic field sensor on the edge, and if you put something like a magnet on it, the computer will go to sleep. There are magnets on top of the Mac laptop display near both sides, and you can try something iron. You can also use a magnet to try the edge underneath.

My air is to put a magnet on the bottom edge and sleep. My macbook sleeps with a magnet on the left near the keyboard fn. This is how Macs detect if your laptop is closed or not.

If the sleep is triggered spontaneously, it is probably a magnetic sensor failure, so remove the magnetic thing near the computer and try again.

If the power indicator is on, the cooling fan port is windy, but the display screen is still black, most of the cases are due to the internal wiring fault or hardware failure of the notebook, such as loose internal memory modules of the notebook, graphics card failure, and display panel failure.

It is recommended that you use the desktop monitor to connect to the external display port of the laptop, and if everything is displayed correctly, the possibility of damage to the motherboard and graphics card is basically ruled out. If it is abnormal, there is a problem with the motherboard or graphics card.