The motherboard does not light up when the computer is turned on

The reason why the motherboard does not light up

1. Power supply problem 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.

2. Cause of the fault: The computer's power cord has poor contact. If the power fan does not move and the motherboard indicator light does not light up after plugging it in, the power cord may be disconnected. The power supply is faulty. If the fault persists, the fault may be caused by memory, graphics card, CPU, motherboard and other devices.

3. This may be a power failure. Generally, the incidence rate of power failure is 80%. Inspection and handling methods: Power supply system failures may be caused by AC power supply circuit breakage, abnormal AC power supply voltage, microcomputer power supply failure, or short circuit in the host.

4. There are many reasons why the light does not turn on. There are power problems. Observe the power supply after turning it on. If the power supply fan rotates, it means there is no problem with the power supply. If it does not rotate, check the socket and plug in the wire. If it is correct or it does not rotate, there are two possibilities: a power supply problem or a motherboard problem. The point does not light up due to a memory failure. The memory needs to be re-plugged or replaced to judge.

What should I do if my computer motherboard gets wet and stops lighting up?

Solution: Clean it. CPU, especially INTEL's LGA pins, should be taken out and wiped carefully to check if there are any stains. Use an eraser to clean the gold finger of the graphics card memory. It is best to wipe it with cotton and alcohol, then blow dry and put it back.

If the host gets damp, open the cover of the host and blow it with a cardboard fan or electric fan. Do not use hot objects or place it in the sun. It can only be dried by air.

If the light does not light up, it may be caused by looseness or oxidation of the memory stick. The treatment method is as follows: The first method is to disassemble the notebook and find the memory stick using the memory plug-in method, open the buckle, remove the memory stick, and wipe it clean. Put it back in and turn it on.

Putting the computer in a ventilated place can also make the computer dry. You can also use the cold air function of a hair dryer to blow the computer to dry it out. Be careful not to use the hot air function of the hair dryer to prevent the computer from becoming hot.

When the computer gets damp, we should take the following measures: Shut down the computer immediately. If the computer encounters water or moisture, the first thing to do is shut down immediately. If the computer is exposed to moisture while it is powered on, the damage to electronic components such as circuit boards may be severe and irreparable.

If the computer motherboard is damp, it can still be used if it is not serious. 1. Remove the motherboard and all accessories, use paper to absorb the obvious water, then use a hair dryer to turn on the hot air and blow it towards each component from a distance of twenty centimeters.

There are several reasons why the computer motherboard is not powered on and the light does not light up. How to solve it

1. The power supply system failure can be caused by AC power supply line disconnection, abnormal AC power supply voltage, microcomputer power supply failure or there is something wrong in the host computer. Caused by short circuit phenomenon and other reasons.

2. Determine the quality of the computer power supply. Step 1: First connect the host power supply (ATX), press the host switch button, if power cannot be supplied, unplug the power plug from the motherboard. Step 2: Use tweezers to short-circuit the green and black wires of the power supply and check whether the fan of the power supply can rotate.

3. Power supply problem. Most motherboards will light up even if they are not turned on after the power is turned on. If they do not light up, first check whether there is a problem with the power supply connection or the power supply itself. .

4. The computer motherboard does not have power and the lights do not light up. There are several reasons to determine whether the computer power supply is good or bad. Step 1: Connect the host power supply (ATX) first and press the host switch button. If the power does not come on, then Unplug the power plug from the mainboard. Step 2: Use tweezers to short-circuit the green and black wires of the power supply and check whether the fan of the power supply can rotate.

5. Check the motherboard indicator light: Some motherboards have indicator lights that can indicate the power supply. Consult the computer motherboard manual and check the status of the indicator lights on the motherboard to determine the specific cause of the failure.

What to do if the desktop computer does not light up when it is turned on

When the desktop computer is turned on, the host is turned on but the screen does not light up. You can use the following methods to solve the problem: first check whether the keyboard light is on, and click the upper left corner of the small keyboard. Press the square numlock or caps switch key and see if the keyboard indicator light responds. If so, pay attention to the system startup sound.

There are several reasons why the desktop computer screen does not light up when starting up: Check whether the computer components are inserted securely. First, please check whether the monitor cable is firmly and reliably inserted into the host interface, and then check whether the contact between the graphics card and the motherboard IO slot is good; confirm whether the monitor is damaged.

The power light of the desktop host does not light up and the machine cannot be turned on. First check whether the power button is malfunctioning: open the case, unplug the power button cable of the host machine, and use tweezers or a screwdriver to short-circuit the power-on terminal (the power button was originally connected to Copper pins are generally labeled Power On or Power SW, PSON, PWRBTN, MBSW).

Check to see if the keyboard light is on. Press the numlock or uppercase switch key on the upper left side of the numeric keyboard to see if the keyboard light responds. If so, pay attention to the sound of the system starting up. If the keyboard light responds, it means that the system starts normally, but there is no display.

So what exactly is the problem? Generally, the following situations often lead to a black screen after the computer is turned on: There is a problem with the monitor, or there is a problem with the connection cable between the monitor and the host. There is a problem with the memory or poor contact. There is static electricity on the motherboard, causing it to become unresponsive.

The above is the detailed content of The motherboard does not light up when the computer is turned on. For more information, please follow other related articles on the PHP Chinese website!