How to clear the laptop's BIOS startup password

How to clear the laptop's BIOS startup password

Many people set a power-on password in the BIOS of the laptop. But once the password is forgotten, it will cause a lot of trouble. Because the power-on password of most laptops is not stored in a CMOS circuit like a desktop PC and can be cleared by discharge, many laptops currently store the password in the logic circuit of the motherboard

Many people set a power-on password in the BIOS of the laptop. But once the password is forgotten, it will cause a lot of trouble. Because the power-on passwords of most laptops are not stored in CMOS circuits like desktop PCs and can be cleared by discharge. At present, many laptops store the passwords in the logic circuit of the motherboard, which cannot be cracked by general means. This article introduces you to several tricks and tries to deal with this problem.

Use the method to clear the power-on password of the PC. Because there is no short-circuit jumper, everyone cut off the power of all computers (including the battery), open the notebook, find the CMOS battery, remove it, wait a few minutes before putting the CMOS battery on.

When some machines change the hardware configuration, such as removing the hard disk memory or something, restarting may automatically enter the BIOS SETUP program, and then, do the right thing.

Try to find the chip with the code name "xxxx818" on the motherboard, such as "MC146818", which has 24 pins, short the 12,24 pins, or find the chip marked "MC14069". Ground its 14th pin. Can achieve the purpose of clear password.

Users can also use password floppy disks to solve problems. The password floppy disk is generated every time you set a power-on password.

For some machines, a more troublesome method can also be used. Prepare an empty floppy disk, and use binary editing software, such as Norton DiskEdit or UltraEdit 32, to modify the first 5 bytes of the first sector of the floppy disk so that it becomes: 4B 45 59 00 00. Note that the boot sector is sector 0 District, do n’t make a mistake. Then save the changes, so that you will have a key disk, put it in the notebook floppy drive, and after resetting, you will be prompted to enter the password and press Enter. The system will prompt you again for the password. Press Y to enter. Then you will see the BIOS setup interface.

Many people set a power-on password in the BIOS of the laptop. But once the password is forgotten, it will cause a lot of trouble. Because the power-on password of most laptops is not stored in a CMOS circuit like a desktop PC and can be cleared by discharge, many laptops currently store the password in the logic circuit of the motherboard

Many people set a power-on password in the BIOS of the laptop. But once the password is forgotten, it will cause a lot of trouble. Because the power-on passwords of most laptops are not stored in CMOS circuits like desktop PCs and can be cleared by discharge. At present, many laptops store the passwords in the logic circuit of the motherboard, which cannot be cracked by general means. This article introduces you to several tricks and tries to deal with this problem.

Use the method to clear the power-on password of the PC. Because there is no short-circuit jumper, everyone cut off the power of all computers (including the battery), open the notebook, find the CMOS battery, remove it, wait a few minutes before putting the CMOS battery on.

When some machines change the hardware configuration, such as removing the hard disk memory or something, restarting may automatically enter the BIOS SETUP program, and then, do the right thing.

Try to find the chip with the code name "xxxx818" on the motherboard, such as "MC146818", which has 24 pins, short the 12,24 pins, or find the chip marked "MC14069". Ground its 14th pin. Can achieve the purpose of clear password.

Users can also use password floppy disks to solve problems. The password floppy disk is generated every time you set a power-on password.

For some machines, a more troublesome method can also be used. Prepare an empty floppy disk, and use binary editing software, such as Norton DiskEdit or UltraEdit 32, to modify the first 5 bytes of the first sector of the floppy disk so that it becomes: 4B 45 59 00 00. Note that the boot sector is sector 0 District, do n’t make a mistake. Then save the changes, so that you will have a key disk, put it in the notebook floppy drive, and after resetting, you will be prompted to enter the password and press Enter. The system will prompt you again for the password. Press Y to enter. Then you will see the BIOS setup interface.

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