What do you do when the computer turns on? (1/3)

1, the power outlet quality problems. Suggest replacing a try.

2, the power supply board capacitor burned. Check the computer board capacitance, if the capacitor is raised, it is the motherboard capacitor burned, to get the computer City repair shop (about 20~30 yuan) can be done.

3, the computer power is burned, plug in the power to start the computer, to observe whether the power supply fan rotation, if not move, is the power to burn, replace a power supply can be.

Failure phenomenon One: Turn on the power, press the boot button, the computer without any movement

Analysis: At this time the power supply should be to the motherboard and the hardware power supply, there is no movement to explain that the power supply part of the problem. (including the motherboard power portion)

Inspection ideas and methods:

1, the mains power supply problem, please check the power outlet is normal, the power cord is normal.

2, chassis power problems, please check whether there are 5 volts standby voltage, the motherboard and power supply between the connection is loose, if not measuring voltage can find a power exchange to try.

3, the motherboard problem, if the above two are not a problem, then the possibility of the motherboard failure is relatively large. First check the motherboard and the power-on button line is loose, the switch is normal. You can put the switch on the wire for a short try. If not, only replace a motherboard to try. (Note: You should try to find the same model or the same chipset board, because other motherboards may not support your CPU and memory)

Failure phenomenon Two: Press the boot button, fan rotation, but no image of the monitor, the computer can not enter the normal working state

Analysis: Fan rotation shows that the power supply has started, the monitor has no image, the computer can not enter the normal working state that the computer did not pass the system self-test, motherboard BIOS settings have not yet been output to the display, the failure should be in the motherboard, video card and memory. However, sometimes bad power and display damage can cause this failure.

Inspection ideas and methods:

1, if there is alarm sound, indicating the problem of self-test. The beep is set by the BIOS on the motherboard. There are two types of bios, namely AMI and award. Most motherboards are BIOS with award.

The BIOS for award is set to:

The long sound keeps ringing: the memory strips are not plugged in tightly.

One short: The system starts normally.

Two short: CMOS setup error, need to reset.

One long short: memory or motherboard error.

One long two short: monitor or video card error.

One long three short: keyboard controller error.

One length nine short: the motherboard BIOS flash RAM or EPROM error.

The BIOS for the AMI is set to:

One short: Memory refresh failure.

Two short: Memory ECC checksum error.

Three short: System basic memory check failed.

Four short: System clock error.

Five short: CPU error.

Six short: Keyboard controller error.

Seven short: System real mode error.

Eight short: Memory error displayed.

Nine short: BIOS chip inspection error.

One long three short: memory error.

One long eight short: the Monitor data cable or video card is not plugged in well.

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