My laptop screen suddenly didn t light up, just like the cable disconnected, it can be turned on wit

First of all, you must be clear about why your phone does not turn on.

There are two kinds of problems with the phone not turning on: hardware or software, and system. If there is an external force, such as being dropped, pressed, flooded, overheated, etc., it must be a hardware problem.

If you have some software, delete some system files, or can't boot after flashing, this is generally a software or system problem. Understand the problem** problem and solve it. There are two situations in which the phone does not turn on, and the solutions are as follows.

The phone is on and responds but can't be turned on normally:

This is the most common situation where your phone won't turn on. When the phone is turned on, there is a vibration and sound, but the screen is dark; After the mobile phone is turned on, it has been stuck in the logo interface and cannot enter the operation interface; There is also the fact that the mobile phone can enter the normal interface but there is no response when you click on anything, etc., which is the most common manifestation of abnormal boot.

First things first: check your phone's battery. The reaction when the phone is turned on proves that the battery is still working, and in addition to the aging of the battery and water ingress, the battery problem can be ruled out.

If the battery is aging, you can try it with the same type of battery, and if it can be turned on normally, then replace it with a battery; If it is water, turn on the device when the water has not yet dried, it will cause a short circuit in the battery, and the phone will only run for a while, and the battery will be damaged due to a short circuit, you can wait for a day or two for the phone to completely dry and change the battery.

Then: check your phone screen. Under the destruction of external forces, the screen fails, especially some mobile phones themselves are soldered, which is particularly prone to "fake not booting" caused by the screen.

Although only a slight fall, but the mobile phone screen is no longer responsive due to the disconnection of the line, at this time you can tap the phone, a few more shots, if the mobile phone screen will flash from time to time, this proves that the mobile phone is only a certain line of problems, you can disassemble the machine after finding the disconnected solder joint to re-weld, or go to the repair point for repair. Especially when the phone vibrates and sounds normally when it is turned on, but the screen does not respond. This is especially the case for consideration.

Again: Check if you can enter recovery, consider flashing. Both of the above are hardware problems, but the phone can't be turned on completely normally, because there are many software or system problems.

If the phone is just stuck in the logo screen or can not be operated when booted into the interface, then check whether the phone can enter recovery, press and hold the power button + volume down key, if the phone enters the following screen, and can move the cursor by moving the volume + and - keys of the mobile phone, then the phone can be solved by flashing.

Remove the graphics card and clear the vents.

There are many reasons why the laptop can't turn on the black screen, it may be the simplest problem of not plugging in the power supply, or it may be the problem of hardware damage.

Reasons why the computer can't turn on the black screen and how to solve it:

Step 1: First of all, according to the specific situation analysis, if there is no power response directly, then check whether there is a power supply, poor contact, hardware and other problems, go to the second step, if it is not possible to enter the system may be operating system or software problems to go to the third step.

Step 2: Check whether there is a power supply problem, first see if the power supply is not plugged in well or there is a problem with the plug, if you are using a battery, then plug it in and try again. You can go to a friend or go to a computer repair shop or sales store to find the same model of power supply to try it.

After replugging the power supply, press the power button again, and if it still can't be turned on, then press it for a while. If you change someone else's power supply to turn on, it means that there is a problem with the power supply, if it proves that there is no problem with the power supply, it may be the hardware reason, go to the fifth step.

Step 3: Go to the last correct configuration to adjust, turn on and press and hold F8, enter the advanced options page, select "The most recent correct configuration", and press Enter. If it can enter the system, it may be caused by viruses, incompatible hardware drivers with the system, or operating systems.

After entering the system, run the anti-virus software, check and kill the virus, if there is a virus, restart the computer after the anti-virus, if it is not normal, it may be caused by the incompatibility of the device driver and the program, delete the graphics card, network card and other drivers, restart it after removing the driver, if there is still a problem, then go to the next step.

Step 4: Repair and install or reinstall the system, set "Optical Drive as the first boot device" in the BIOS, then insert the system disk, and press the R button to perform "Repair and Installation". If the fault persists, just at the beginning of the system, select "One-click GOST to restore the system" or use the system disk to reinstall the system.

Step 5: Check whether there is a hardware problem, disassemble the notebook to see if the hardware is loose, generally the hardware is not plugged in well, there will be an alarm sound, the long sound continues to sound that the memory module is not plugged in tightly, one long and one short means that the memory or motherboard has a problem, one long and two short means that the graphics card is wrong. If there is too much dust inside the notebook, it is best to clean it up first.

In addition, pay attention to whether it is caused by the new hardware, if it is normal before the replacement of the hardware, and it is not normal after the replacement, then check whether it is compatible. If it doesn't start at this time, it's best to send it for repair, and a professional will check whether there is a problem with your hardware one by one.

Precautions: There can be many reasons for not turning on the machine, don't be irritable in the process of troubleshooting, be careful, if you don't know much about the computer, don't repair blindly, so as not to cause greater damage, you should find professionals to repair in time.

It's likely that the temperature inside the case is too high, so restarting the problem right away won't be resolved, so just wait a while and turn it on. For the first floor is talking about memory problems,I have doubts,If it's a real memory problem,It's true that it won't turn on when it starts.,But the case will continue to emit a "Didi" sound.,I think you shouldn't have this situation.。 The first floor was later repaired, probably because he used an eraser for a long time, and the temperature of the machine cooled down, so it was fine.

1. Remove the battery on the back of the laptop and use only the power adapter.

Connect to the computer and try to turn it on, if the boot is normal, then it is caused by poor battery contact or battery failure.

2. Only use the battery, do not connect the power adapter, if the boot is normal, then it should be caused by a problem with the power adapter or a short circuit in the power interface of the notebook.

3. Unplug the power cord, remove the battery, and press and hold the power button for 30 seconds without letting go. Try to boot up, if the boot is normal, then it is only caused by the abnormal BIOS of the motherboard.

4. Unplug the power cord, remove the battery, open the back cover of the memory, plug in and unplug the memory, and wipe the gold finger with an eraser.

part, reinsert the envy (don't reverse).

5. If the above operations cannot solve the problem, it is recommended that the notebook be sent to the maintenance center for testing.

Wipe, how to feel should be connected to the power screen is bright, disconnected from the power with the battery screen dark. However, you can adjust the brightness manually. It doesn't matter.

First of all, it is necessary to determine whether it is a true black screen or a pseudo-black screen (that is, the screen backlight is gone, and you can see the words on the screen if you look carefully, and you can see it with a flashlight) If it is a pseudo-black screen, the lamp tube is generally broken, and the lamp tube needs to be replaced.

The true black screen is mostly a problem with the graphics card chip,If it is the beam closed chip of the NVIDA graphics card door, including the integrated graphics card, if you want to completely solve it, you must replace it with the new and improved version of the graphics card chip,Otherwise, it will definitely **,If it is not the chip of the graphics card door, such as ATI, you only need to add welding。

Adapter issues.

Try it with another adapter, or try this adapter on another laptop;

The system looks at the power of the battery and whether it can be charged.

There are several possibilities:

a. Battery failure, B. Charging interface failure, c. Motherboard failure, no matter what the reason is, the laptop and power adapter will be sent to the official service center after the collapse, and the professional guess wheel fuel maintenance engineer will do a detailed test to confirm the specific problem and its cause.

Power-on screen no display failure, this situation is mostly caused by loose aging of components or chip virtual soldering damage, the machine is damp and shocked or long-term overheating will lead to this situation, it is recommended that you find a good technical repairer before the loss of maintenance Pin Oak Qingfu to help you repair, common reasons: loose memory or memory itself has a problem, reinsert the memory or change the memory to try; The power supply chip of the motherboard is soldered or aged, the screen cable is loose or the motherboard supplies power to the screen such as a short circuit of imitation circuit; The graphics card, south bridge, and north bridge BGA packaging chips are soldered or damaged, which can be solved by professional BGA packaging and welding equipment and technology.

Fan turn proves that the power supply is fine. Is there a boot sound? Enter the sound of the desktop?

Possible causes and solutions for laptop boot screen not lighting up:

1) There is a problem with the display cable or a bad touch.

It can be judged by an external monitor. If there is a problem, send it for repair.

2) The memory module is loose or the gold finger is dirty.

Do a memory gold finger cleaning, clean the slot with a brush and reinsert it tightly.

3) If you have a discrete graphics card, you may also have the problem of 2 above.

Clean the gold finger of the discrete graphics card, clean the slot with a brush and reinsert it tightly.

4) Check whether there is a problem with the onboard graphics card or the discrete graphics card.

Tested by 1 model.

5) The motherboard settings change suddenly, the motherboard battery is dead, or there is a problem with the display driver.

Restore the factory settings of the motherboard, replace it with a new battery, etc., and then boot the test.

In short, checking the black screen requires careful analysis of the possible causes, checking and messing around, until the boot sees the logo.

1. 1 Short: The system starts normally. This is something we hear every day and it also shows that there is nothing wrong with the machine.

2. 2 Short: General error, please go to CMOS Setup and reset the incorrect options.

3. 1 long and 1 short: RAM or motherboard error. Try to change the memory, if it still doesn't work, you have to change the motherboard.

4. 1 long and 2 short: The monitor or graphics card is wrong.

5. 1 long and 3 short: The keyboard controller is wrong. Check the motherboard.

6. 1 long 9 short: Motherboard flash RAM or EPROM error, BIOS corruption. Try a different block of flashram.

7. Constant ringing (long sound): The memory module is not plugged in tightly or damaged. If it still doesn't work, you can only replace a memory module.

8. Non-stop ringing: The power supply and display are not properly connected to the graphics card. Check all the plugs.

9. Repeated short ring: power supply problem.

Sent for repair, hardware failures are the majority.