Suddenly the black screen can t turn on, what is the reason why the black screen can t turn on?

There are many cases where the system cannot be turned on, and generally speaking, there are probably several hardware reasons that cause the system to fail to boot.

1. The power supply of the computer fails, resulting in the inability to supply power to the host normally. This is usually manifested by the main engine power supply not lighting up.

2. This kind of failure is generally caused by poor contact between the memory module and the motherboard memory slot, and the memory damage or the motherboard memory slot problem will also cause this kind of failure. There will usually be a continuous long tone alarm.

1. You can hear a "tick" sound when you turn on the machine (normal startup sound); If the host boots normally, if it is not displayed, check whether the power supply is normal. Check if the cable is loose (if the motherboard has an integrated graphics card and a discrete graphics card, check that it is plugged in correctly). Check if the graphics card is loose or oxidized, and reseat it (or the memory if the graphics card is integrated).

Second, you can't hear a "beep" sound when you turn it on; Explain that the fault lies with the host, open the chassis and check.

1. Power on, if the power supply and CPU fan are running normally. It may be that the memory is oxidized. Solution: Disconnect the host from power, unplug the memory, wipe it with an eraser and plug it back in. (If you have a discrete graphics card, check the discrete graphics card in this way).

2. After powering on, the CPU fan does not rotate; It may be that the motherboard has a power supply failure, check for leakage or bulging capacitors. If not, the fault is more hidden, please check it by a special person.

3. After powering on, the power supply fan does not rotate; First, check whether the power plug is loose. If the plug is normal, disconnect the power plug, connect the "green wire" and "black wire" holes of the plug with a paper clip or wire, and then connect the power supply. If it does not turn, it means that the power supply is broken, and replace the power supply.

Is it a shutdown, or is it just a black screen...

Hello, if the phone has a black screen and cannot be turned on, in this case, it is first recommended that the landlord check whether the phone is out of battery? You can connect your phone and charger to charge your phone and see if the battery is too low? If the battery is too low and the power is automatically turned off, then you need to charge it for a while and try to turn it on again.

And in the future, it should be noted that the battery will be automatically shut down when it is out of power, which will cause great damage to the battery and reduce the life of the battery. If it is because the battery is dead and the black screen cannot be turned on, then it can be solved after charging.

If there is no response after charging, or the landlord's mobile phone is turned off before it is turned off, the power itself is very much, in this case, the battery problem can be basically ruled out. If it's still black, there's no way to turn it on. It is recommended that the landlord can dial the ** on the mobile phone to try to see if the mobile phone can make sound normally.

If it is an occasional system problem that is stuck, then the phone will also have a black screen, but it is possible to operate the phone normally, such as calling the phone **The phone will make a sound. In this case, if it is stuck, it is recommended that the landlord keep holding down the power button to force restart the mobile phone to solve the problem.

If the landlord tries, you can basically rule out the above two reasons, basically to rule out the battery is dead, and it is not the mobile phone stuck machine, then in this case, it may be caused by some other problems with the mobile phone, such as the hardware of the mobile phone may be problematic, and it may also cause the mobile phone to fail to turn on, in this case, it is recommended that the landlord can send the mobile phone to the after-sales service for testing and repair.

The computer has a black screen and can't be turned on.

Step 1: When there is a problem that the machine cannot be turned on, we can first adopt the method of discharging static electricity. The specific operation method is to first dial off the power supply of the host, and then press the power supply of the host several times;

Step 2: If the above method doesn't work, we can also try to open the host panel. Before operating, disconnect the power supply of the returning host. Find a button-sized thing on the motherboard, it is the [BIOS] battery.

There is usually a spring for fixing on the outer ring of the battery, and the battery can be removed by pressing and holding;

Step 3: Manually remove the [BIOS] battery from the motherboard and put it back in a few minutes. After restoring the [BIOS] battery, connect the main unit to the power supply and see if it can be turned on normally;

Step 4: Remove the memory module on the motherboard, and then turn it on again to see if the host will beep an alarm. If there is, then there must be a memory problem;

Step 5: After the memory module is removed, you can wipe the gold finger with an eraser, and then put it into the motherboard. If everything is normal, you should be able to start the console normally at this time and see the boot screen;

Step 6: When the above two methods do not work, we can also use the minimization method to test. What is a minimization test? It is to remove all the other interfaces of the hail cavity on the motherboard, leaving only the CPU, memory and power supply to see if it can be turned on normally.

Of course, when dialing the interface cable on the motherboard, please remember where it is located to avoid plugging it incorrectly when restoring. Generally, we can remove the optical drive, hard disk, and graphics card;

Step 7: When using the computer, sometimes you will encounter a hard disk failure, resulting in a failure to boot normally. At this time, you can see the boot screen, but the computer stays on the self-test interface. If the problem with your hard drive is severe, you'll also hear a sound from your hard drive.

If this is the case, just remove the hard drive and the computer will immediately return to normal;

The above are the steps for the computer to turn on the black screen, I hope it will help you.

It's hard to judge if this isn't described.

The suggestions are as follows: 1. Whether the computer is out of power, check the power supply, etc.

2. Check whether the lower wire is in poor contact.

3, still not work, conditional replacement parts test, one by one to check 4, not will be sent for repair, back-end detection.

How to solve the black screen of your computer:

1. Check whether the connection cable between the monitor and the computer is tightly installed;

2. Remove the computer memory module, wipe the gold finger with an eraser and put it back (poor contact will cause the computer to boot up with a black screen);

3. Replace the memory, graphics card, display, and cable to diagnose the fault.

4. The system file is corrupted, use the U boot tool to reinstall the system.

Reasons for the black screen of the phone:

1. It may be a system problem.

2. It may be a problem with the screen.

3. It may be a problem with the motherboard.

Solution: 1. If it is the first problem, you can try the home button + power button and press and hold for 8 seconds, and you can force it to start.

2. If it is the latter two problems, it is recommended to send it directly to the after-sales maintenance center for the engineer to test.

There are many factors that the mobile phone cannot be turned on, and the battery, mobile phone software, and hardware will cause this kind of failure to turn on. We recommend trying the following:

1.Please do it again: press and hold the power button to check whether you can enter the boot interface.

2.If you can enter the boot interface, but your phone cannot enter the home page, please restart your phone to try. The steps are as follows:

Press and hold the power button and the down volume button at the same time for more than 7 seconds to restart the device (Note: Some models need to press and hold the power button for 8-10 seconds to restart the phone).

If the problem persists, it is recommended that you bring the purchase invoice, warranty card and mobile phone to the local Samsung service center for professional engineers to help you test.

3.If you press and hold the power button to enter the boot interface, check whether the battery is too low, please connect the phone to the original charger and charge it for a period of time before turning it on. If it still does not turn on after a few minutes of charging, it is recommended that you bring the purchase invoice, warranty card and mobile phone to the local Samsung service center for professional engineers to help you test.