Why does the laptop not turn on?

Oh, there are generally three such reasons: the chip is damaged, the battery is out of power or the battery is damaged, and the virus program (repair or replace the chip, charge or replace the battery, press the F8 key to kill the whole disk).

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

Motherboard failure: Motherboard failure is the main reason why laptops won't turn on. It is often caused by factors such as liquid ingress of the notebook, damage, and damage to the components of the motherboard itself.

1: Check if the power cord is plugged in. 2：

Check whether the hard disk is loose, and operate it after power-off and shutdown. 3: If the hard disk is loose, disassemble the computer and re-close and plug in the hard disk.

4: If there is a Didi sound after Brother Biyan is turned on, he will manually disassemble the computer and re-insert the memory module. Summary:

1: Check if the power supply is plugged in 2: Check whether the hard drive is loose.

3: Check whether the memory module is loose.

The possible reasons are as follows:

1. If there are two memories of motherboard failure and memory failure, it is recommended to pull out one memory and keep one memory for boot attempt.

2. Graphics card and screen cable failureGeneral graphics card and screen cable failure can usually enter the operating system, if you have set up the boot**, if you can hear the sound of entering the system when you boot up, it means that the graphics card or the screen cable is faulty or loose. For the above hardware failures, it is estimated that the vast majority of users cannot handle it, so it is recommended to send it for repair.

3. Loose hardware, such as loose memory or graphics card, especially the memory has the greatest chance, try to plug it in and unplug it again.

4. If the motherboard BIOS error is caused by the motherboard BIOS error, you need to clear the BIOS, complete the discharge operation, and reset it. The above reasons can only answer for you a general direction of failure, for Xiaobai, even if we encounter hardware failure, we can't repair it ourselves, but we can try whether the hardware is loose and the motherboard clears the BIOS.

1) The first reason is that the power adapter of the notebook is damaged and cannot be powered on, or the battery of the notebook is out of power, and it cannot be turned on from the surface to the black screen. Solution: Replace the power adapter or fully charge the battery.

2) The second reason: is that the memory and graphics card of the notebook are oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in inability to turn on, black screen, treatment method:

Solution: It is to remove the power supply, open the back cover of the notebook, take out the card slot of the memory, if it is not an independent graphics card soldered to the motherboard, also take out the card slot, align the part of the memory and the gold finger of the graphics card (that is, where there is a copper sheet) and wipe it back and forth with an eraser a few times, blow the ash, and then insert it back, cover the back cover, and it is generally OK to boot up.

First, analyze it on a case-by-case basis.

The notebook won't turn on for the following reasons:

1. There is no response when the laptop is turned on, the indicator light does not light up after pressing the power button, the fan does not rotate, and the computer does not respond. This situation could be that the laptop battery is dead, the external AC power supply is damaged, or the connection is not good. Please check the external AC power supply, you can also change a charged battery, and then turn on again, if it can be turned on, then the external power supply or battery is damaged.

If it still can't be turned on, you need to take it to the after-sales service for maintenance.

2. After the laptop is turned on, the power indicator lights on, but the display screen does not respond or you can hear the sound of the computer entering the desktop. There are two problems in this situation, one is that the memory module is loose, and the other is that the internal connection cable is not in good contact, it is recommended to reinsert the memory module, and then turn it on, if it still can't be turned on, you need to take it to the after-sales service for maintenance.

3. The laptop enters the system interface, and it restarts repeatedly or the blue screen. This situation is likely to be due to the high temperature of the internal hardware of the computer, such as the CPU fan does not rotate, the graphics card or other hardware failure, etc., or it may be a system problem, you can try whether you can reinstall the system, if you can't reinstall the system, you need to go to the after-sales service for maintenance.

Extended Materials. A notebook computer, also known as a portable computer, is a personal computer that is compact and easy to carry. The current trend is to be smaller and lighter, but more powerful.

Although the body of the laptop is very lightweight, it is fully capable of daily operation and basic business, entertainment, and computing operations. Today's laptops are differentiating different trends according to their uses, netbooks tend to be daily office and movies, business laptops tend to be stable and low power consumption to obtain longer battery life, home laptops have good performance and high cost performance, and gaming laptops are specially designed to cater to a small number of people going out to play games, audiophile configuration, and good entertainment experience.

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

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.

There can be many reasons for not turning on the machine, don't be irritable in the investigation process, 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 a professional to repair it in time.

1. Common reasons why the laptop cannot be turned on.

1. Power supply problems.

If it is an external power supply, first see if the power supply is not plugged in properly or there is a problem with the plug. If you are using a battery, it may be that the laptop power supply is running low.

2. The motherboard is faulty.

Motherboard failure is the main reason why laptops won't turn on. It is often caused by factors such as liquid ingress of the notebook, breakage, and damage to the components of the motherboard itself.

3. Circuit failure.

In addition to artificial liquid ingress and short circuits, most of the failures of laptops that cannot be turned on are problems with the protection isolation circuit, the failure of the boot circuit and the EC peripheral circuit, and sometimes the circuit will be burned out in a large area.

4. BGA failure.

BGA failure is also caused by the failure of the laptop to turn on, which is extremely common in notebooks that use DBM as the Southbridge chip in the Swift Relaxation generation.

5. If it cannot be solved, it is recommended to send it to the after-sales center for maintenance.

First, analyze it on a case-by-case basis.