Computer motherboard does not respond when powered on

Why does the motherboard not respond after the power is plugged in?

1. Generally, after most motherboards are powered on, the indicator light on the motherboard will light up even if the computer is not turned on. , if it does not light up, first check whether it is a problem with the power connection or the power supply itself. Especially the 24Pin interface of the motherboard and the CPU power supply cable interface must be firmly plugged in.

2. First, remove the power supply of the computer host, plug in the power adapter and see if it can be turned on. Maybe the power supply is broken and the power is not enough to carry the machine. Just replace the power supply. It may be that the power supply module on the motherboard is broken.

3. If the power cannot be turned on at this time, it means there is a serious short circuit. The ATX power supply is internally protected. It does not allow the voltage it outputs to be connected to ground, so the power supply is automatically protected internally. Possible short circuits include a short circuit on the red wire, a short circuit on the yellow wire, a short circuit on the purple wire, or a short circuit on the main power supply terminal of the CPU.

4. The main reason why the display does not reflect is that there is too much dust on the memory strip. First open the host shell, take out the motherboard as shown in the picture, and find the location of the memory strip. Push the levers on both sides of the hole where the memory module is located outward to facilitate direct removal of the memory module. After pushing the levers on both sides outward, remove the memory module directly.

5. There is a problem with the mains power supply. Please check whether the power socket and power cord are normal. If there is a problem with the power supply of the chassis, please check whether there is a 5V standby voltage and whether the connection between the motherboard and the power supply is loose. If you cannot measure the voltage, you can try to find a different power supply and try it.

6. After all power is turned off, wait a few minutes and try to turn it on. If it is still abnormal, it means the computer's power supply is broken. Also, try changing the power cord connected to the host. Often we will ignore the smallest fault. It's the computer itself. There are many reasons for this regarding the computer itself.

What to do if the computer host does not respond when it is turned on and the power button does not light up

1. When there is a problem that the computer cannot be turned on, we can first use the method of releasing static electricity. The specific operation method is to first unplug the power of the host, and then press the power switch of the host several times; if the above method does not work, we can also try to open the host panel.

2. There is something wrong with the power button itself. As a result, the power supply contact is poor, so there is no response when pressed. This reason is very common, and the solution is to decisively replace the host button, or replace the button connection cables of the power button and reset button. There is a problem with the filter capacitor of the host power supply.

3. If it still doesn't work, you can take the computer to someone else's house and try it out to see if it can be opened. If it still doesn't work, take the computer for repair. The computer host does not respond when pressing the power button. If the mouse lights up, it means that the motherboard is powered. Make sure the power indicator light on the host computer is on. If it is on, it may be a memory problem.

The computer motherboard is powered on, but the fan is spinning. Why can’t it be turned on, and the display screen is not responding?

The computer cannot be turned on, but the display light is not on. The host can be turned on, the fan is spinning, and the keyboard and mouse are not working. Bright. What should be the reason is poor hardware contact.

Fault phenomenon: After turning on the power and pressing the power button, there is no movement from the computer. Check ideas and methods: It may be a power supply problem. Please check whether the power socket and power cord are normal.

The graphics card fan is damaged, causing the graphics card to overheat and stop working. This is a self-protection mechanism to prevent the chip from burning. In this case, please shut down the computer immediately and replace the fan of the graphics card. It should return to normal.

The computer is plugged in but cannot be started, and the host is unresponsive.

1. First, remove the power from the computer host, plug in the power adapter and see if it can be turned on. Maybe the power supply is broken and the power is not enough to carry the machine. Just replace the power supply. It may be that the power supply module on the motherboard is broken.

2. The computer cannot be turned on, and there is no response when pressing the power switch. There are several possibilities for this situation: the power cord is loose, or the power strip is loose, or the strip is not powered on. The host power supply is broken. The computer's motherboard is broken. The switch button on the main unit is broken, or the button is stuck.

3. Power supply problem: The power supply may not provide enough power to start the computer. This could be caused by a power failure, power line failure, or power overload. Internal connection problems: The connections inside the computer may be loose or damaged, preventing the computer from starting.

4. There is a problem with the power supply of the chassis. Please check whether there is a 5V standby voltage and whether the connection between the motherboard and the power supply is loose. If you cannot measure the voltage, you can try to find a different power supply and try it. Motherboard problem, if there is no problem with the above two, then the possibility of motherboard failure is relatively high.

5. If the system cannot be started at all, the power indicator light cannot be seen and the sound of the cooling fan cannot be heard. At this time, first check whether the connections are connected properly and whether the power cord is loose. If not, it can be basically determined that the power supply is partially faulty.

The computer host cannot be turned on when it is powered on

1. There may be many reasons why the computer host is powered on and the lights are on but cannot be started. The following are some possible reasons: Power supply problem: The power supply may not provide enough power to start. computer. This could be caused by a power failure, power line failure, or power overload.

2. Reasons why the machine cannot be turned on: 1. Memory problem: it doesn’t work in any slot, nor does it work on other machines. You can only replace the memory. The buzzer usually makes an abnormal sound. 2. Compatibility issues: Other machines can be used, but this one cannot. Or a single stick can be used separately, but two sticks cannot be used.

3. First, remove the power supply from the computer host, plug in the power adapter and see if it can be turned on. Maybe the power supply is broken and the power is not enough to carry the machine. Just replace the power supply. It may be that the power supply module on the motherboard is broken.

4. The main reason why the computer host suddenly cannot turn on the machine is because the host is often moved and the power interface on the back of the host is in poor contact, so that when the host is turned on, it cannot be powered on normally, causing the host to be unable to turn on. Solution: Re-fix the power interface on the back of the host and try to turn it on.

5. Install the battery, restart the computer and you will find that the computer can start normally. Other solutions If you still can't boot after following the above method, it means there is a problem with the memory. Don't worry, it's just a few simple steps. Open the case, find the memory module and remove it.

Causes and solutions for why the motherboard does not work when powered on

1. Possible short circuits include red wire short circuit, yellow wire short circuit, purple wire short circuit or CPU main power supply terminal short circuit. If any of the above short-circuit phenomena occurs in an actual motherboard failure, power will be forcibly powered on but no power will be supplied.

2. Cause analysis: There are many reasons why the computer can be powered on but cannot be turned on. They are mainly related to hardware, such as low power output voltage, damaged motherboard components, CPU overheating, poor contact between graphics card and memory, etc. They need to be analyzed one by one. exclude.

3. There are many reasons why the motherboard cannot start after power on. It may be caused by the CMOS battery on the motherboard being out of power and the battery needs to be replaced. It may be caused by poor contact between the gold fingers of the memory module. You can pull out the memory module. , and then re-insert it for use; it may be caused by poor contact with the graphics card, and the graphics card needs to be reconnected for use.

4. Solution: The keyboard light does not light up. First, wipe the memory stick with an eraser, and check whether there are burnt marks on the gold finger of the memory stick. Replace the memory slot. Check the capacitors and resistors on the motherboard to see if there are bulges in the capacitors and whether there is a burnt smell on the motherboard, and clean the dust on the motherboard.

5. Solution to the problem that the computer cannot be turned on when the motherboard is powered on. Fault phenomenon 1: After turning on the power and pressing the power button, there is no movement in the computer. Analysis: At this time, the power supply should supply power to the motherboard and various hardware. If there is no movement, it means there is a problem with the power supply part.

6. The computer host does not work when powered on. There are several possibilities for this situation: the power cord is loose, or the power strip is loose, or the strip is not powered. The host power supply is broken. The computer's motherboard is broken. The switch button on the main unit is broken, or the button is stuck.

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