1-computer assembly and maintenance

I. hardware composition

1. CPU (Central processing Unit)

1 > main frequency: clock rate at which the CPU kernel works

Front-end bus frequency: directly affects the speed of data exchange between CPU and memory

2 > Cache: ease the speed difference between CPU and memory, L1 level L2 level

3 > Common brands: intel AMD

2. Memory: SDRAM, DDR,SD, main parameters: capacity, frequency

3. Hard disk: interface type: IDE,SATA (mainstream), SCSI, SSD main parameters: capacity, revolution, interface type

4. Optical drive: CDROM-RW DVD-RW

5. Video card: interface: PCI, AGP, PCI-E chip, capacity

II. Introduction to BIOS

1. Basic input and output system: stores basic computer hardware information and cannot be easily hot-swappable.

2. The function of BIOS: power on self-test, initialize, boot the operating system.

(when the computer starts up, it shows that the "cmos battery failed" motherboard has insufficient power and the battery needs to be replaced.)

Third, troubleshooting

1. When the keyboard is wrong or does not exist, the computer stops starting and displays "keyboard error or no keyboard present press F1 to continue."

2. Troubleshoot according to the alarm tone:

Buzzer keeps buzzing-memory error, clear dust or memory slot, wipe memory gold finger with eraser

The buzzer sends out a long or two short alarm sound: the video card is wrong or does not exist, the processing method is the same as above.

Fourth, expand:

BIOS settings: 1. Disable USB

2. Block LOGO

3. Modify startup items

4. Restore factory settings, etc.