Laptop cannot be turned on is one of the most frequently repaired faults in notebook maintenance. What are the reasons and solutions for notebooks not turning on? Generally, this situation is caused by the failure of the memory or hard disk. Of course, it may also be a system failure. It is recommended to shut down and re-plug the memory and hard disk, and then press the power button several times without connecting to the power supply. Below I will introduce to you in detail the reasons why the laptop cannot be turned on, and what to do if the laptop cannot be turned on. Part 1 Reasons why the laptop cannot be turned on Q: Kitchen storage and storage
There are many reasons why the laptop cannot be turned on. It may be the simplest problem of not being plugged in the power supply properly, or it may be the problem of hardware damage. Only by analyzing the specific problems of your own situation, and patiently finding the problem, can you solve the problem. We can make a simple judgment based on the notebook phenomenon.
1. Power problem
If it is an external power supply, first check whether the power supply is not plugged in properly or there is a problem with the plug. If the battery is used, it may be that the power supply of the notebook is insufficient. As long as it is charged more before use, this problem will be solved.
2. Mainboard failure
Mainboard failure is the main reason why the laptop cannot be turned on. It is often caused by factors such as notebook liquid entering, breaking, and damage to the components of the motherboard itself.
3. Circuit failure
Except for artificial liquid ingress and short circuit, most of the failures of notebook computers that cannot be turned on are due to problems with the protective isolation circuit And the power-on circuit and the EC peripheral circuit are faulty, and sometimes the circuit is burned out a large piece.
4. BGA failure
The BGA failure is also the failure of the notebook computer that cannot be turned on. DBM is very common in notebooks with south bridge chips.
Part 2 There is no response when the laptop is turned on. Q: Kitchen storage and storage
Generally, it means that the laptop does not respond when the power button is pressed, that is, the indicator light does not light up and the fan does not work after pressing the power button. Turning around, the laptop doesn’t respond at all. The most common case of this is that the laptop battery is dead, or the external AC power supply is damaged or poorly connected.
1. Check whether it is a power problem
First, check whether the power supply is not plugged in properly or there is a problem with the plug. If the battery is used, plug it in Power and try again. You can find a friend or try a power supply of the same model. If it can be turned on, it means that the external power supply is damaged. If not, it means that there may be a hardware failure inside the laptop or the laptop’s power-on button fails. In this case, it is recommended to take it for repair. [How to detect the failure of the power adapter]
2, Check whether the key parts are loose
If the computer freezes after moving , it may be that the computer is greatly shaken during the moving process, resulting in loose parts inside the computer and poor contact, resulting in a crash. Turn on the machine and re-tighten the memory, graphics card, hard disk and other equipment. [Notebook disassembly process]
3. The notebook cannot be turned on due to hardware damage
Motherboard failure: The motherboard failure is the notebook The main reason why the computer won’t turn on. It is often caused by factors such as notebook liquid entering, breaking, and damage to the components of the motherboard itself.
Circuit failure:Except for artificial liquid ingress and short circuit, most of the failures of notebook computers that cannot be turned on are the problems of the protective isolation circuit and the failure of the power-on circuit and the EC peripheral circuit. Failure, sometimes the circuit is burned out a large piece.
BGA failure: BGA failure is also a failure of notebook computers that cannot be turned on. It is extremely common in Centrino generation notebooks that use DBM as the south bridge chip.
The above three kinds of hardware damages can only be carried out by professional maintenance personnel. Let professional personnel conduct systematic inspection on your computer and troubleshoot.
Part 3 The laptop can’t boot into the system Q: Kitchen storage storage Kitchen storage
Enter the last correct configuration to make adjustments: press and hold F8 to enter the advanced options page, select “Last Correct Configuration”, and then Enter.
1. If you can enter the system, it may be caused by virus infection, hardware driver incompatibility with the system, operating system, etc. After entering the system, run the anti-virus software to check and kill the virus. If there is a virus, restart the computer after the virus is removed.
2. If it is still not normal, it may be caused by the 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 is still a problem, then fix it. Install or reinstall the system. Repair installation or reinstall the system, set the “CD-ROM as the first boot device” in the BIOS, then insert the system disk, and press the R key to perform “repair installation”. If the fault still persists, when you first enter the system, select “One-click gost restore system” or use the system disk to reinstall the system. [U disk one-key installation tutorial]
Part 4 Laptop restarts repeatedly or blue screen Q: kitchen storage storage kitchen storage
This situation is likely to be caused by the high temperature of the internal hardware of the computer, such as the CPU fan does not turn, 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 about the blue screen of the notebook
1. The program error will cause a blue screen. Sometimes it’s just a program or driver that makes a mistake for a while, and it can be fixed after a reboot.
2. Improper addition of new hardware will cause a blue screen. Check that the new hardware is plugged in securely, unplug it, try another slot, and install the latest drivers.
3. Improper addition of new drivers will cause blue screen. If a new driver for a hardware has just been installed and a blue screen failure occurs, please go to safe mode to uninstall or disable the new driver
4. The virus will cause a blue screen. For example, viruses such as shock waves and oscillating waves sometimes cause the Windows blue screen of death, so it is essential to scan and kill viruses.
5. The newly installed computer sometimes has a blue screen. For newly installed computers often blue screen problems, you should check and upgrade the bios to the latest version.
6. The system file will be replaced with blue screen. Start — run sfc/scannow to check whether the system files have been replaced, and then use the system installation disk to restore (for those who don’t, it is the fastest to reinstall the system directly).
7. If there is too much dust on the fan of the notebook, the heat dissipation of the notebook is not good. If you continue to use it, the notebook will automatically reduce the frequency to reduce heat or directly blue screen to protect the motherboard. Generally, the fan will be cleaned. The problem can be solved.
8. Press the F8 key quickly when starting up, and the Advanced Boot Options menu will appear, then select “Last Known Good Configuration” to start the computer. [Causes and solutions for computer blue screen]
Notes for normal use:
1. Do not block the heat dissipation holes, and do not let notebooks and soft objects such as quilts Wait for close contact.
2. Restart and crash caused by power problems, such as voltage instability, surge, under-load, etc., can be installed on the battery to use the notebook.
3. Do not connect laptop batteries and high-power electrical appliances to the same power bank, especially high-power electrical appliances such as air conditioners.
Part 5 Other Reasons for Laptops Not Turning On The light is on, but the display is unresponsive or I can still hear the computer entering the desktop. This phenomenon shows that the host is normal, and the problem lies in the monitor and graphics card. This situation is caused by two problems, one is that the memory stick is loose, and the other is that the screen cable connected to the monitor inside the notebook is in poor contact. Check whether the connection between the monitor and the graphics card is normal, and whether the connector is normal. If possible, try to replace the graphics card and monitor. It is recommended to take it for warranty, which is generally caused by internal hardware or loose wiring.
The external device is short-circuited
The external device is short-circuited, or the USB interface is short-circuited. It is also necessary. Unplug all external devices, such as mouse and keyboard, plugged in U disk, external screen, etc., and try to boot again. If it doesn’t work, it is one of the above problems. If you don’t understand it, you need to check it with professionals.
Part 6 What is the reason for the black screen when the notebook is turned on? Poor CPU contact and overheating; poor memory stick contact; poor power performance; machine infected with CIH virus, BIOS is destructively refreshed; Microsoft black screen, please apply a patch.
Solution:
1. When the notebook is in sleep or hibernation state, and then the notebook is in a suspended black screen state, it will be mistaken for a black screen. So check if you are in these two states.
2. Power on, all power and hard disk light indicators are normal, but the monitor is a black screen, which may be caused by insufficient power supply, plug in the power supply.
3. Power on, after the computer brand is displayed, press F8, enter, enter, enter safe mode, advanced startup options, last correct configuration, enter, enter, press to try !
4. If it doesn’t work, enter the safe mode, start it normally, press Enter, and after it reaches the desktop, complete the antivirus!
5. Use: 360 security guards, in “Trojan killing”: “360 system first aid kit”, system repair. Select all, fix now! Network repair, start repairing! One more point: start first aid! After restarting, click “File Recovery”, select all, and delete the files completely!
6. If it doesn’t work, download “Driver Life” and upgrade: graphics card driver! Reboot, if it still doesn’t work, you need to “one-key restore” or “reinstall the system”!
7. Sometimes the failure to boot is caused by the short circuit of some components, such as external USB devices, keyboards, mice, or power adapters. Try to unplug these devices and only install the battery. Turn it on and see if you can enter the BIOS or something.
8. When the CD-ROM is turned off when there is a CD-ROM in it, the CD-ROM will be started first when the CD-ROM is started next time. Some CD-ROMs are bootable, so the hard disk cannot be started after the CD-ROM is started. As a result, it cannot be turned on, please make sure that there is no CD in the CD-ROM.
TIPS Conclusion Q: Kitchen storage and kitchen storage
1. There can be many reasons for the machine not turning on. Don’t be irritable during the inspection process, be careful. If more damage is caused, you should seek professional repairs in time.
2. Since the computer is a high-tech product and the update speed is very fast, a new grade is launched almost every year, so be sure to choose a popular advanced model, and try not to buy outdated products. There is a higher chance of product failure. Buying a computer can not simply pursue the cheap price. Of course, families with better economic conditions can also buy the latest models.
3. At present, the computer market is diverse, with many brands, and the product purchase channels are complicated. It is difficult to distinguish the advantages and disadvantages from the appearance alone. Therefore, try to buy brand computers when purchasing, that is, buy some domestic and foreign famous brand products. The quality and after-sales service of these products are guaranteed, but the price will be more expensive, but the quality is more guaranteed.
