The boot screen is black, and there is no response when you press any of the health

1. Conduct a self-test on your phone. Most brands of mobile phones have a deep sleep mode, and once you enter this mode, it will often cause the phone to go black.

Won't turn on. Solution: Press and hold the power button of the phone for more than 10 seconds to see if you can force restart.

Or press and hold the volume up button and the power off button at the same time, and feel the phone vibrate and force restart. Generally speaking, this step can solve the problem of black screen on most mobile phones.

2. The battery is dead or malfunctioning. Solving this problem is as simple as connecting the charger for a while and then trying to turn it on. You can also directly buckle the battery and charge it with a universal charger to see if the connector of the battery is loose.

If it can be turned on after charging, it means that the battery is just dead. If it still doesn't work, you can try a different battery. Check if the battery is faulty and no longer has power.

3. In addition, a violent fall on the mobile phone may also cause the mobile phone to have a black screen. This is a troublesome situation, and it is likely that the hardware of the phone is malfunctioning, so it will have to be repaired.

Extended Information: Common troubleshooting of mobile phones:

Symptom: The phone crashes.

1. There are too many programs running in the background.

Open an app, after using it, most people return to the desktop of the phone by pressing the back button of the phone, thinking that this is to quit the app, but in fact there is no real exit from the app. As a result, more and more apps run quietly in the background over time, and when the number reaches a certain level, it will cause the phone to crash.

Many people will be too lazy to upgrade the app, but when the app version is too low, it will be incompatible with the mobile phone system. In the same way, when the mobile phone system version is too low, it will not be able to meet the requirements of APP operation. As a result, there will be a flashback.

Upgrade to a new version or upgrade your phone system to a new version, and then restart your phone.

3. Mobile phone poisoning.

Mobile phone applications installed from unknown sources** may carry malicious**, resulting in mobile phone poisoning or anti-virus software.

Interceptions will cause flashbacks.

4. Software conflicts.

There are too many software installed on the mobile phone, and due to the different degrees of optimization, it is easy to have a collision guide shell sensitive flashback. In particular, if there are too many installations of the same type of software, this phenomenon is more likely to occur, after all, there is a competitive relationship between each other.

Solution: Check your phone once in a while, and uninstall some apps in time if you don't use them. Try not to install too much software of the same type, and it is recommended to use small programs for occasional use.

As far as it goes, thanks to Android.

The mobile phone will produce more and more cache files, and the mobile phone will crash when it exceeds a certain load.

Solution: Regularly clean and accelerate the mobile phone, and clean up the application software that occupies a large amount of memory.

What shows Dong Xiang is that the computer is trying to boot from the network.

If the interface of network boot can boot normally and display the desktop after the scroll, it is the boot device in the BIOS that is set incorrectly, and the hard disk is set as the first boot device in the BIOS.

If the network is still repeated after booting and cannot be booted, then it may be that the hard disk is damaged or the system is damaged. If the hard disk does not lack the problem of chatter, it is good to reinstall the system.

If you are using a vivo mobile phone, you can connect the original charger and data cable and force restart the mobile phone to try:

FunTouch OS and later models: Press and hold the "Power button" + "Volume Down button" at the same time for more than 10 seconds;

Press and hold the top round button for more than 10 seconds to force restart the phone (applicable to NEX 3 NEX 3S);

FunTouch OS previous system comic banquet models: Press and hold the "power button" for more than 12 seconds.

If the operation is invalid, you can bring your mobile phone and purchase voucher to the customer service center for testing and processing, customer service center address: enter vivo official website vivo**app--my-service outlets or vivo official website web version--bottom - service support--service network query--select provinces and cities to query the address of the customer service center. It is recommended to contact ** in advance before going to avoid empty running, plan the itinerary reasonably of Shanyin, and travel safely.

If you are using a Huawei mobile phone, it is recommended to bring the Baokai Cover repair voucher to the nearest Huawei Customer Service Center for repair, and the actual repair** is subject to the final inspection of the Huawei Customer Service Center**.

Boarding service. Make an appointment for service.

Maintenance Luyan spare parts** inquiry.

There are two situations when the computer boots up the display with a black screen: the screen is not powered on (the power indicator is not on) or the screen is powered on but there is no signal or "no sighal" is displayed, the former means that the power is not on or the power cable is not in contact or damaged, and the latter is generally the memory module or monitor data cable is not in good contact, or the memory, graphics card, monitor or data cable is damaged.

Handling suggestions:1If the monitor is powered on but shows no signal, turn off the power (if the power switch is short pressed and there is no grinding effect, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, replug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn on the power after installation (before operation, you should also touch the wall with both hands to release your static electricity or wear anti-static gloves).

If you don't know how to operate, then a simple lead bucket point: palm or kick the chassis can be done (note the location: the right side of the shell without an interface in the left and right sides of the chassis; Attention Tract:

Don't push too hard or which). The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

2.If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.If the monitor is not powered on (the indicator light is not on), check whether the power switch is turned on, then check the back of the monitor, plug the power cord connected to the monitor upwards (the power cord can be replaced if possible), and check whether the other end of the power cord is powered on to the outlet.

4.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, it means that the monitor is damaged and needs professional repair.

You're on a computer with a black screen.

It's still a black screen on your phone.

Causes of black screen of computer: (1) Failure caused by the power supply of the host computer.

Black screen failures caused by a damaged host power supply or poor host power quality are common. For example, when some new equipment is added, the display has a black screen failure, after eliminating the quality and compatibility problems of accessories, the quality of the power supply is not good, and the lack of power is the main cause of the failure, at this time, you may also hear the horn in the machine 12 consecutive alarms, replacing the high-power and high-quality power supply is the best solution to this kind of failure. In addition, some motherboards have ATX dual power connectors, and the wrong choice of jumper settings can also cause this kind of failure.

2) Failure caused by the quality of accessories.

Poor quality or damage to computer accessories is the main cause of black screen failure or build-up of the monitor. For example, the motherboard (and the CMOS of the motherboard), memory, graphics card.

Something that goes wrong and so on can definitely cause a black screen glitch. If the fault is orange, the replacement method is the fastest solution to replace the graphics card, memory, and even the motherboard and CPU.

3) The quality of the connection between the accessories.

The main cause of black screen failure is the incorrect or loose connection between the memory, graphics card, etc., and the motherboard. Moreover, if there is a problem with the connection between the graphics card and the monitor, this kind of failure may also be caused, until the AT power supply is not plugged in correctly, and even if the hard disk or optical drive data cable is reversed, it may also cause the boot black screen failure.

4) Black screen glitch caused by overclocking.

Overclocking or overclocking parts that are not suitable for overclocking will not only cause a black screen failure, but also damage to accessories in severe cases. There is also excessive overclocking or parts that are not suitable for overclocking, poor heat dissipation after overclocking, or heat dissipation fan damage in ordinary use, not turning at all, etc., will cause the system to protect itself, crash, black screen, etc.

5) Black screen caused by other reasons.

Others, such as incorrect CMOS settings on the motherboard and incorrect clearing of CMOS jumpers on the motherboard, can cause a black screen failure, in this case, you can change the settings according to the instructions of the motherboard. In addition, software conflicts such as drivers.

Improper installation, improper DIY, such as BIOS flashing error, incorrect power management settings, hardware damage caused by malignant viruses (such as CIH), etc., may cause the appearance of black screen failure of the display. When you encounter this kind of failure, you may wish to think more carefully, consider the causes of the failure, and solve the failure, know yourself and the other, and get twice the result with half the effort.

You're also, happy with your question. The screen is black, the keys are not responding, then your phone screen is broken, take it to a repair shop for repair.

It's a black screen.,The limb button doesn't respond.,Slow liquid I think in general,I think this is to see if Likai has a mobile phone.,Is there no charge in the computer.,Try again.。

Whether it's a mobile phone or a computer, if it's a computer, take a look at whether the LED light of the memory module on the chassis is on, usually near the boot button.

Go to the after-sales service to see the reason.

Hello,According to your problem description,Why here is the solution for you to provide the wisdom leak is as follows:The button machine can be turned on but the screen is black1.If the monitor is powered on but no signal is displayed, turn off (if the short press on the power switch is ineffective, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, replug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn on the power after installation (before operating, you should also touch the wall with both hands to release your static electricity or wear anti-static gloves).

If you don't know how to operate, then it's simple: slap or kick the chassis with a kick (note the location: the front of the shell on the left and right sides of the chassis that has no interface at the back; Attention Tract:

Don't push too hard). The above may require a repeat of the anterior skin rot, and if it doesn't work, you will need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

The computer is turned on with a black screen, and you can see "no signal" on the LCD screen, subtitles, which is "no signal" in English, that is to say, the host has no image signal input to the screen, and there are three reasons for this:

1) The first reason: it is possible that the connection between the desktop host and the monitor is not in good contact (especially the interface is not plugged in or loose), and there may be a problem with the data cable of this connection, so there will be no signal input to the screen, no display, black screen, solution: just re-plug the connected data cable, or replace the data cable.

2) The second reason: due to the formation of an oxide layer on the surface of the gold finger of the memory or independent graphics card, resulting in poor contact between the memory and the memory slot, the poor contact between the graphics card and the graphics card slot, resulting in a black screen and no signal output

Handling method car royal block: You can first dismantle the beam electricity, open the compartment, dial out the memory, use the eraser against the part of the gold finger (that is, where there is a copper sheet,) wipe back and forth a few times, and then insert back into the memory slot (or insert it back into a memory slot), it's OK, if there is an independent graphics card, you can use the same method to deal with the graphics card, and then insert it back into the graphics card slot, and finally install the machine, close the hu and restart the computer OK, (take the memory ** as follows:)

<>3) The third reason: that is, the graphics card's video memory is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, and naturally the computer will have no signal output, and it will not be able to display, and the screen will be black when it is turned on.

Please take a closer look at my answer, I hope it will help you, I have seen your problem, I have encountered 1 before, it may be that the memory is not plugged in well, most people think that the memory is not plugged in and will alarm, or can enter the BIOS, in fact, it is not, if the memory is not plugged in, it is a black screen, there is nothing self-test information, and the CPU fan can also rotate normally. You can try to change the memory to another slot, when the memory is installed, it is installed on one side of the slot, try to press it horizontally at both ends, if the problem is solved, congratulations.

2. The problem of the motherboard, the north bridge of the motherboard is damaged and faulty, at this time, the motherboard can not self-test normally, so there is nothing on the screen.

Added:The power supply fan of the boot motherboard is turning,The first self-test is the memory,If you can't detect the memory, there won't be any display,The CPU won't alarm if it's not installed.,It's not the turn of the CPU yet.。 The CMOS battery may not start when it is empty, that is, you can't see anything, but under normal circumstances, the CMOS battery will not run out of power all at once, unless it has not been turned on for a long time.