When the computer is turned on, it cannot start normally and successfully enter the operating system. There are two situations:
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1. The self-test can be passed, but If you cannot enter the system desktop, it is usually caused by a system or driver problem:
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In the case of excluding viruses, this situation is usually due to the GHOST version being installed. Or other simplified and modified versions of operating systems. Because they integrate many drivers that are not necessarily applicable to your hardware devices, the system cannot correctly identify and load the necessary hardware devices and system settings for the system. As a result, the operating system cannot be entered normally. Desktop. It is recommended to download the original image installation version and reinstall the system, and also install the driver with Microsoft WHQL certification. Generally, this kind of situation can be avoided.
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If you don’t want to reinstall the system, try booting F8 into safe mode and uninstall the incompatible driver for the hardware device (that is, right-click the device in the device manager)>Properties>The driver does not have it>Digital Signature Program>Microsoft Windows Hardware Compatibility Publisher driver), after booting up, automatically identify the hardware device, reinstall the driver you downloaded (WHQL) that has passed Microsoft digital signature certification, and then restart the computer again to see if there is any improvement.
< p>.Furthermore, there are conflicts caused by software with duplicate functions in the system (such as the installation of 2 or more anti-virus software, firewalls, and ad blocking).
< p>.Check the system log -> Press Win+R or click "Start" in the lower left corner of the screen>Run>Enter: EventVwr.msc (you can also open>Control Panel>Administrative Tools>Event Viewer )> After opening, click on each log under "Customize View>Management Events" and "Windows Logs", double-click to open the red error and yellow warning items, and view the specific error information. Then make corresponding repairs based on the specific error information. . If there are errors involving third-party software, uninstall the software. If it is a system error, you can try manual repair or system restore. Log out or restart the computer. Then enter the system to see if the system has been restored to normal. If the error still occurs and cannot be repaired, you can Use system backup to restore the system to its initial state, or completely reinstall the operating system.
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Method to repair system file errors: Insert the original installation CD, click Start, and find the "Accessories" "Command Prompt", right-click "Run as administrator", and then enter the "SFC /Scannow" command in the pop-up window. (You can try to repair it in safe mode)
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2. When the computer is turned on, the self-test cannot pass smoothly and there is no "beep" sound, because there is a hardware failure. Caused by: The following possibilities need to be investigated and hardware faults repaired:
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1. The system time cannot be displayed and saved correctly because the motherboard battery is insufficient. Replace it. A new motherboard battery, and pressing the DEL key to enter the BIOS when turning on the computer to reset the correct system time can solve this type of failure.
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2. Check the motherboard capacitor. There are no bulges or leaks. If there are any, you need to go to a professional computer repair place to replace the motherboard capacitor.
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3. Unplug the memory module and graphics card respectively, and wipe the metal with an eraser. After lifting your fingers, re-insert the memory slot and graphics card slot and secure them.
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4. Re-insert all hardware and cables securely to avoid malfunction due to hardware failure. , so that the hardware has a virtual connection, causing the computer to fail to start normally. Pay attention to the self-test of the memory and other hardware (such as keyboard, mouse, optical drive, hard disk) when starting up.
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p>5. With the case open, start the computer and see if the CPU (graphics card) fan is running normally. If not, you can remove dust from the fan, add lubricating oil to the shaft, and apply it to the CPU (or graphics card, GPU). Re-apply thermal silicone grease. If the fan is still not working properly, you need to replace the fan.
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6. Check whether the power supply of the chassis is insufficient. If you have a more powerful chassis on hand, Try replacing the power supply. You can determine whether the computer cannot start normally due to power problems.
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7. Press DEL (usually F2 for laptops) to enter the BIOS when you turn on the computer. Check to see if the hard drive can be recognized. If not, replace the hard drive data cable and try again. If the hard drive can be recognized, you can use a CD or USB boot disk to set it as the first startup item. Boot the computer into WinPE. Use DiskGenius>Detect And try to repair bad sectors on the hard disk. ★Important note: Repairing bad tracks on the hard disk will destroy the data on the bad tracks and adjacent sectors.
Please back up the hard drive data before repairing bad sectors on the hard drive to avoid unnecessary data loss!!!
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8. There is no signal on the monitor, focus on checking the display part Secondly, check whether the memory is plugged in properly. If the monitor has a black screen or blurred screen when booting, it is most likely caused by a hardware failure in the graphics card or the monitor itself.
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9. Make a preliminary hardware fault judgment based on the alarm sound from the small speaker (buzzer) of the boot case and your specific BIOS information. (For the specific meaning of the startup alarm sound, please check your motherboard manual. If you don’t have a motherboard manual, you can go to the motherboard’s official website Download.)
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10. If the problem cannot be solved after checking steps 1-9 above, you can use the substitution method or the minimum loading method to check whether other hardware exists item by item. Fault. If there is a motherboard diagnostic card, you can plug it in and start the computer for hardware detection. In order to narrow the scope of hardware fault troubleshooting
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11. When you encounter a situation where you can’t use various methods To solve the hardware failure, it is recommended that you contact the after-sales service for warranty or repair for brand-name machines. For non-brand compatible machines, go to a professional repair center with good skills for repair~
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12. After troubleshooting the hardware fault, you still cannot boot into the system normally. Use the startup disk to boot the computer into WinPE, and use system backup to restore the system. If there is no system backup, use the original image (CD) to reinstall the operating system. It is recommended to install the operating system with Microsoft WHQL certified driver.