What should I do if my notebook doesn't enter the BIOS?

As you know, the BIOS setup method for the desktop board BIOS and notebook is not exactly the same, and the motherboard BIOS setup is relatively simple, but the problem can be solved quickly. However, if there is a problem with the notebook BIOS, it is not a good solution. This article will introduce the functional principle of BIOS, combined with several examples of notebook BIOS problems for the notebook BIOS failure to do a detailed explanation.

BIOS management features include:

The 1.BIOS Interrupt Service program is essentially a programmable interface between software and hardware in the microcomputer system, which is mainly used for the indirect of software function and computer hardware. For example, WINDOWS98 to the floppy drive, optical drive, hard drive, such as management, interrupt settings and other services, programs.

2. BIOS System Setup program: The microcomputer part configuration record is placed in a writable CMOS RAM chip, which mainly preserves the basic condition of the system, CPU characteristic, soft hard drive and other parts information. The System Setup program is installed in the BIOS ROM chip, which mainly sets the parameters in the CMOS RAM. This program can enter the setting state by pressing a key while powering on, and provides a good interface.

3.POST on self-test: After the microcomputer is connected to the power, the system first checks the internal devices by the program of "Self Test" and "Power-on self-test". Usually full post self-test will include the cpu,640k basic memory, more than 1M of extended memory, ROM, motherboard, CMOS memory, serial port, display card, soft and hard plate system and keyboard test, once in the self-test found problems, the system will give a message or siren warning.

4. BIOS System Boot Bootstrap procedure: After the system completes post self-test, ROM BIOS first search for soft hard drive and CD-ROM in accordance with the boot sequence saved in the system CMOS settings, the network server and so on effectively start the drive, read into the operating system boot record, The system control is then handed over to the boot record, and the boot record completes the system's sequential boot.

Notebook boot Unable to enter BIOS failure instance explained:

1, how to enter the notebook computer BIOS: Failure phenomenon: A second-hand notebook computer, need to enter the BIOS to make some settings, but do not know the shortcut keys. Failure analysis and Processing: Most laptops enter the BIOS in different ways than desktops, and most laptops are in [F1], [F2], [F10] or [Ctrl+alt+esc] keys. Many other laptops can also set up the motherboard BIOS through a dedicated program.

2, the elimination of CMOS can not start: failure phenomenon: In the BIOS modified the hard drive parameter settings, save after reboot, in the system self-test, the speaker alarm sound, start failure. Turn off the computer, the motherboard above the jumper to clear the CMOS, and then set the jumper to the default state after the power-on, power LED is not lit, the CPU fan does not turn, the computer can not start. Fault analysis and processing: it is estimated that after switching off the computer and socket, the computer power plug due to the quality of the socket problem, still under the charged state, resulting in the elimination of the CMOS is not successful. Unplug the computer power socket, plug in again, then turn on the computer power switch, you can clear the fault.

3, on the boot memory detection for a long time: failure phenomenon: After the motherboard changed once, each boot memory must be detected time to enter the operating system. Fault analysis and Processing: memory detection is a necessary process for computer to start. It is estimated that the "Quick PowerOn self Test" item is not set to "Enable" in the BIOS so that the memory is checked 3 times. Set it to "Disable" and then save the exit so that it can be quickly tested for memory when it starts.

4, the BIOS can not be set: Failure phenomenon: The computer boot into the BIOS setup program, in addition to setting the "User password", "Save Modify Exit" and "Do not save Exit" 3 items, the rest are inaccessible. Failure Analysis and processing: This phenomenon is estimated to be damaged CMOS, you can try to discharge treatment, if the CMOS discharge after the failure can not be resolved, you can also try to upgrade the BIOS. If the failure persists, it may be a problem with the CMOS memory and replace it.

5, refresh the BIOS after the computer is not normal: failure phenomenon: A computer in the BIOS can be refreshed after the boot, but sometimes there is no end of the crash, or in the operating system when the panic. Failure Analysis and processing: The cause of the problem should be caused by refreshing the BIOS, it is estimated that the BIOS program or BIOS version of the other motherboard is not correct. Because motherboard manufacturers often launch a chipset of the motherboard, will be introduced after the upgrade and improved version, so you can add some new features. For this upgrade and improved version, there is no significant change in functionality, so the hardware design changes are very small, the BIOS program is very similar. So, even if the BIOS is wrong, sometimes it can be started. Since the computer can also be started, you can try to enter the DOS real mode to brush the original BIOS program back, you should be able to solve the problem.