The computer does not respond when it is turned on, and there is no response when the computer is tu

I have encountered this situation for two reasons, 1. Dust has entered the pinhole of the CPU. Get the CPU down and blow it. 2. Dial the jumper of power and plug it in again.

I think you're having a problem with the power switch of the motherboard.,It's the power sw jumper that's broken.。

I mind if you just pulled that jumper out and short-circuited it.

There's something wrong with that button, isn't that little red light not on? It's good to lift the host and throw it in the air.,It's okay to kick it twice.,But I think it's better to throw it twice.,But don't make it too high.,3 cm is enough.,That's what mine is.。

This should be carefully checked and the dust should be cleaned up.

Fault symptom 1: Turn on the power and press the power button, the computer has no movement.

Analysis: At this time, the power supply should supply power to the motherboard and each hardware, and there is no movement to indicate that there is a problem with the power supply part. (including the motherboard power part).

Check the ideas and methods:

1. If there is a problem with the mains power supply, please check whether the power socket is normal and whether the power cord is normal.

2. If there is a problem with the power supply of the case, please check whether there is a 5 volt standby voltage, whether the connection between the motherboard and the power supply is loose, if you can't measure the voltage, you can find a power supply to change it.

3. Motherboard problems, if there are no problems with the above two, then the possibility of motherboard failure is relatively large. First of all, check whether the connection between the motherboard and the boot button is loose and whether the switch is normal. You can try shorting the switch with a wire.

If not, you can only try replacing a motherboard. (Note: Try to find a board with the same model or chipset, as other motherboards may not support your CPU and memory).

Fault phenomenon 2: Press the power button, the fan rotates, but the monitor has no image, and the computer cannot enter the normal working state.

Analysis: Fan rotation means that the power supply has started to power supply, the monitor has no image, the computer cannot enter the normal working state, the computer has not passed the system self-test, the motherboard BIOS settings have not been output to the monitor, and the fault should be on the motherboard, graphics card and memory. But sometimes a poor quality power supply and a damaged display can also cause this failure.

Check the ideas and methods:

1. If there is an alarm sound, it means that there is a problem with the self-test. The alarm sound is set by the BIOS on the motherboard. There are two types of BIOS, which are AMI and Award. Most motherboards are AWARD BIOS.

The BIOS of the award is set to:

A long and constant sound: the memory module is not plugged in tightly.

One short: the system starts normally.

Two shorts: The CMOS settings are incorrect and need to be set again.

One long and one short: Memory or motherboard error.

One long and two short: The monitor or graphics card is wrong.

One long and three short: The keyboard controller is wrong.

One long and nine short: Flash RAM or EPROM error of the motherboard BIOS.

The BIOS of the AMI is set to:

1. Short: Memory refresh failure.

Two shorts: The memory ECC verification error is incorrect.

3. Short: The basic memory check of the system fails.

Four short: The system clock is wrong.

Five short: There is an error in the CPU.

Six short: The keyboard controller is wrong.

Seven short: The real mode of the system is wrong.

Eight short: Displays a memory error.

Nine short: BIOS chip inspection error.

One long and three short: memory error.

One long and eight short: the monitor data cable or graphics card is not plugged in.

I hope it can help you, if you still can't solve it, you can refer to:

There are three reasons.

Reason 1: The power supply is broken.

Cause 2: The cable is loose.

Reason 3: Motherboard problems.

The solution is as follows:

1. Power detection, unplug the widest cable plugged into the motherboard. (It is a cable output from the power supply) 2. Use a paper clip to short circuit the green and black wires, if the power supply fan is working, then the power supply is good, if it is not working, this is a power supply problem.

3. Open the main chassis, unplug the jumper between the switch and the motherboard, short-circuit it, and observe whether it is started.

4. Replug the power supply into the motherboard, and try to turn it on.

5. If the problem cannot be solved, it is recommended to take the computer to a computer repair shop for maintenance.

After your computer turns off the switch, see if the mouse is on, if it is on, you will carefully check the internal wiring connection of the case, if it is not lit after closing, you will change to a motherboard, try it, I hope you adopt.

Take out the memory card and erase the memory module, this has happened to my computer a few times!

You see if the data cables of the graphics card and the monitor are connected. Or if there is a problem with the power supply of the monitor.