Laptop cannot be turned on is a very common problem. So what is the reason why the laptop cannot be turned on? What should we do? Let’s take a look together!
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The reason why the laptop cannot be turned on
0 laptop cannot be turned on. There are many reasons why the laptop cannot be turned on. It may be the simplest problem of not plugging in the power supply, or it may be a problem of hardware damage. You must analyze the specific problems according to your own situation and patiently find the problem to solve the problem. We can make simple judgments based on the phenomenon of the notebook.
1. Power supply problem
If it is an external power supply, first of all, you need to see if the power supply is not plugged in properly or there is a problem with the plug. If you use a battery, it may be that the laptop power supply is insufficient, and it will solve this problem by charging more before use.
2, motherboard failure
motherboard failure is the main reason why laptops cannot be turned on. It is often caused by liquid inlet, brokenness, and damage to the motherboard components.
3, circuit failure
Except for artificial inlet and short circuit, most laptops cannot turn on the machine are problems with the protection isolation circuit and the startup circuit and the EC peripheral circuit. Sometimes the circuit is burned out.
4, BGA failure
BGA failure is also a failure that cannot be turned on by laptops. It is extremely common in laptops that use DBM as the Nanqiao chip in Xunchi Generation.
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There is no response when the laptop is turned on
generally means that the laptop has no response when the boot key is pressed, that is, the indicator light does not light up after the key is pressed, the fan does not turn, and the laptop has no response at all. The most common situation is that the laptop battery is out of power, or the external AC power supply is damaged or the connection is not good.
1. Check whether it is a power problem
First, see if the power supply is not plugged in properly or there is a problem with the plug. If the battery is used, plug in the power supply and try again. You can go to a friend or try the same model of power supply. If the power can be turned on, it means that the external power supply is damaged. If it cannot, it means that there may be hardware failure inside the laptop or the laptop boot button fails. It is recommended to use it for repair in this case.
2. Check whether the key components are loose
If the computer crashes after moving, it may be that the computer is greatly vibrated during the movement, causing the components inside the computer to be loose and poor contact, causing the crash. Open the machine and re-tighten the memory, graphics card, hard disk and other devices.
3. Hardware damage causes the laptop to not be opened
motherboard failure: motherboard failure is the main reason why the laptop cannot be opened. It is often caused by liquid inlet, brokenness, and damage to the motherboard components.
Circuit failure : In addition to artificial fluid inlet and short circuit, most laptops cannot turn on the machine are problems with the protection isolation circuit and the startup circuit and the EC peripheral circuit. Sometimes the circuit is burned out.
BGA fault : BGA fault is also a failure that cannot be turned on by laptops. It is extremely common in laptops that use DBM as the Nanqiao chip in Xunchi Generation.
or above three hardware damages are required to perform them, so that professional repair personnel can conduct systematic inspections on your computer and troubleshoot problems.
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The laptop cannot enter the system.
enters the last correct configuration for adjustment: press F8 to open the computer to enter the advanced options page, select "Latest 'correct configuration", and press Enter.
1. If you can enter the system, it may be caused by virus infection, hardware drivers are incompatible with the system, and operating system. After entering the system, run the antivirus software to check for the virus. If there is a virus, restart the computer after the antivirus.
2. If it is not normal, it may be caused by incompatibility between the device driver and the program. Delete the graphics card, network card and other drivers. After deleting the driver, restart it first. If there are still problems, then repair the installation or reinstall the system. To repair or reinstall the system, set "optical drive as the first boot device" in the BIOS, then insert the system disk, and press the R key to "repair and install". If the fault remains the same, just when you first enter the system, select "One-click gost restore system" or use the system disk to reinstall the system
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Laptop reboot repeatedly or blue screen
This situation is likely to be that the internal hardware temperature of the computer is too high, such as the CPU fan does not rotate, the graphics card or other hardware failures, etc. It may also be a system problem. You can try to reinstall the system.
What to do if the blue screen of a laptop is
1. The program error will cause a blue screen. Sometimes it’s just a program or driver that makes a mistake at the moment, and after restarting, you can change it.
2. If new hardware is added improperly, it will cause blue screen. Check if the new hardware is plugged in firmly, unplug it, then try changing the slot, and install the latest driver.
3. If the new driver is added improperly, it will cause a blue screen. If a new driver with a hardware has just been installed, there is a blue screen failure, please go to safe mode to uninstall or disable the new driver
4. Virus invasion will cause a blue screen. For example, viruses such as shock waves and oscillation waves can sometimes cause Windows Blue Screen of Death, so it is essential to detect and kill viruses.
5. Newly installed computers sometimes have blue screens. For newly installed computers, the bios should be checked and upgraded to the latest version.
6. The system file is replaced back to the blue screen. Start--run sfc/scannow to check whether the system files have been replaced, and then use the system installation disk to restore (those who don’t know how to reinstall the system directly is the fastest).
7. If too much dust accumulates on the laptop fan, the laptop will not dissipate heat well. If it continues to be used, the laptop will automatically reduce frequency and reduce heat or directly screen to protect the motherboard. Generally, cleaning the fan can solve the problem.
8. When you press the f8 key quickly when you turn on, the advanced startup options menu will appear. Then select "Last correct configuration" to start the computer.
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When using it, please pay attention to
1. Do not block the heat dissipation hole, and do not let the notebook and soft objects such as quilts have close contact.
2. Restart and crash failure caused by power supply problems, such as voltage instability, wave surge, underload, etc., you can install a battery to use a laptop.
3. Do not connect the laptop battery and high-power appliances to the same power supply seat, especially high-power appliances such as air conditioners.
The laptop display does not respond
After the laptop is turned on, the power indicator light is on, but the display does not respond or the computer can still hear the sound of the computer entering the desktop. This phenomenon shows that the host is normal, and the problem lies in the monitor and graphics card. There are two problems in this situation. One is the memory stick, and the other is the poor contact between the screen cable connected to the monitor inside the notebook. Check whether the cables between the monitor and the graphics card are normal and whether the connectors are normal. If possible, try replacing the graphics card and the display. It is recommended to use it for warranty, which is generally caused by internal hardware or loose lines.
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short circuit of external device causes
external device to be short-circuited, or the USB interface is short-circuited, and it is also possible that the power cannot be turned on, so it is necessary to conduct a separate discharge test on the device. Unplug all external devices, such as mouse and keyboard, plugged USB disk, external screen, etc., and then turn on the computer. If you don’t work, it is one of the above problems. If you don’t understand, you need to be tested by professionals.
What is the reason for the black screen of the laptop when it is turned on?
There are many reasons for the black screen of the laptop. Common reasons for the black screen are: poor display data cable contact; poor graphics card contact or; poor CPU contact and overheating; poor memory stick contact; poor power performance; the machine is infected with CIH virus, and the BIOS is destructively refreshed; Microsoft's black screen, please patch it.
Solution
1. When the notebook is in a sleep or dormant state, the notebook is in a false death black screen state, and it will be mistaken for a black screen. So check whether it is in these two states.
2. Turn on the power supply and hard disk light indicators are normal, but the monitor is black. It may be caused by insufficient power. Plug the power supply.
3. Turn on the computer, after exiting the computer brand, press F8, enter, enter, enter, enter, enter, enter, enter, and enter the safe mode. Advanced startup options. The last time the correct configuration is entered, enter, enter, press to try!
4. If it doesn't work, enter the safe mode, start normally, enter, enter, and after reaching the desktop, all viruses are eliminated!
5. Use: 360 Security Guard, "Trojan Check and Kill" in "360 System First Aid Kit", system repair. All, repair immediately! Network repair, start repair! Click again: Start first aid! After restarting, click "File Recovery", select all, and delete files completely!
6. If it doesn't work, download "Driver Life", upgrade: graphics card driver! If it still doesn't work, you need to "one-click restore" or "reinstall the system"!
7. Sometimes the inability to boot is caused by short circuits in some parts, such as external USB devices, keyboard and mouse, or power adapter, etc., try to unplug these devices and boot with only battery installation to see if you can enter the BIOS.
8. When the optical drive has an optical disk in it, the next time you start the optical drive, the optical drive will be directly started first. Some optical disks have the boot properties, which makes it impossible to start the hard drive after the optical drive is started. If the power cannot be turned on, please make sure there is no CD in the optical drive.
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