The computer can be turned on, the CPU fan is normal, and the monitor does not light up.

The reason may be in the memory, first cut off the power supply, take off the motherboard battery, unplug the memory, wipe the gold finger, on the small copper contact point, in order to install it, power on, if not, can only be sent for repair.

Personally, I think that since there is nothing wrong with the display, the problem should start from the motherboard that is often the source of the problem, since you don't have a self-test sound, it should be a problem with a component or connected device on the motherboard. Integrated graphics, north-south bridges, and even capacitor bursting can all cause the problems you mentioned above.

What you said, there is no way to judge the specific ** problem here, it is recommended that you go to the computer city to buy a hardware test card, and then follow the instructions on the manual to check. If you don't have much experience in repairing computers, it is recommended not to move as much as possible, if you break more, then you will lose more than you gain.

It is recommended to unplug all the hardware on the motherboard and plug it in again and try again.

I think it's still the motherboard is broken, you should take it to a master and take a look.

The CPU fan turns but the monitor does not light up, and the solution is as follows:

1. Turn on the computer and press the power button on the computer host. If the indicator light on the console is on, your console is powered on. If it doesn't light up, it means that the power is not on.

2. Check the display, if the indicator light of the display is flashing, then the connection line between the monitor and the host is normal; If there is no signal, then the cable is not normal.

3. Open the case cover and see if the CPU fan is rotating normally and whether the indicator light of the motherboard is on. If it is normal, generally there is no problem with your motherboard, etc.

If this is the case, you can do the following:

1. Unplug the computer power cord first, and press the on/off button on the chassis 5-6 times. Releases the residual charge of the motherboard, as indicated in the diagram below.

2. Then open the side panel of the chassis and plug and replace the slots of the memory, as shown in the following figure.

3. Remove the CMOS battery on the motherboard and install it after 1 minute, as shown in the figure below.

4. The computer has an independent graphics card, and it is best to plug and unplug the graphics card. After the above operations are completed, the computer is powered on again, as indicated in the following figure.

What should I do if the desktop computer turns on the CPU and the power fan normally, but the monitor has no picture and the keyboard light does not light up?

Hello, at this time you can press the keyboard case keys to see if the keyboard case light can be lit. If it can be lit, there is a problem with the graphics card or monitor. If it doesn't light up, the self-test can't do it, and the computer is not working properly.

Recommendations, 1Turn off the power off, take down the memory and erase the gold finger part with an eraser. 2.

Press the power button 5-6 times quickly and wait for 2 minutes3Plug the memory back in, and then power on to try to turn it on. 4.

If it still doesn't work after that, get off the hard disk, turn it on again to see if it can enter the BIOS or if it can light up, if it can't be the motherboard or memory problem, you need to send it for repair.

Summary. Hello dear I am glad to answer for you The computer is fully dusted. To reinsert and unplug each board, wipe the gold finger with an eraser, and wipe the CPU with silicone grease, generally the size of a soybean grain, to clean up the dust on the radiator and fan.

Except for the power cable from the motherboard to the main chassis, the other power cables must be plugged and unplugged again.

Hello dear I am glad to answer for you The computer is fully dusted. To reinsert and unplug each board, wipe the gold finger with an eraser, and wipe the CPU with silicone grease, generally the size of a soybean grain, to clean up the dust on the radiator and fan. Except for the power cable from the motherboard to the main chassis, the other power cables must be plugged and unplugged again.

The graphics card fan and the CPU fan are turned, which does not mean that these two components are good, and it may also be that the data cable from the graphics card to the display is not connected properly. In short, there are many possibilities. You need to check them one by one.

Use the isolation method, place the motherboard outside the case, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, and then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

The computer is just a fan turning, the display does not respond, there must be a problem with the computer hardware, it is best to use the replacement method to eliminate the problem, judgment method: 1. Press the upper and lower case keys on the keyboard. The light is on, indicating that the graphics card, monitor, and other hardware are faulty.

First of all, the monitor is fine.

You can do this, first unplug the hard disk power, remove the data cable, remove the graphics card, network card and memory, and leave only the power supply and the motherboard CPU, turn on and power on, if there is an alarm tone, it means that the motherboard CPU is fine, if not, it must be a problem with the motherboard or CPU.

Use an eraser to wipe the display card and the memory gold finger part, remove the dirt on the surface and then add the memory into it, listen to the alarm sound if there is no change, if the same, it is poor contact or damage to the memory, if it is changed to one long and two short, it is the display card error, at this time you can connect the display card back, connect the display, turn on, if the alarm disappears, the display does not light up, that is the problem of the display card.

Yes, it's OK when it's on.

However, it is not ruled out that the above faults are caused by insufficient or damaged power supply, because the automatic shutdown caused by the previous automatic shutdown may also be the CPU overheating protection, check whether the cooling fan has poor contact or insufficient revolutions.

In both cases, it is possible to burn the CPU or motherboard.

Summary. The computer boots up, the display does not light up, the CPU graphics card fan is transferred to the family, hello! We'll be happy to answer for you.

First of all, you can do this to make sure that the display is fine, first unplug the hard disk power, remove the data cable, remove the display card, network card and memory, and leave only the power supply and the motherboard CPU, power on, if there is an alarm sound, it means that the motherboard CPU is fine, if not, it must be a problem with the motherboard or CPU.

The computer boots up, the display does not light up, the CPU graphics card fan is transferred to the family, hello! We'll be happy to answer for you. First of all, you can do this to make sure that the display is fine, first unplug the hard disk power, remove the data cable, remove the display card, network card and memory, and leave only the power supply and the motherboard CPU, power on, if there is an alarm sound, it means that the motherboard CPU is fine, if not, it must be a problem with the motherboard or CPU.

Related information: wipe the display card and memory gold finger part with an eraser, remove the dirt on the surface and then add the memory into it, listen to the alarm sound whether there is any change, if the same, it is the memory contact poor or damaged, if it changes to one long and two short, it is the display card error, at this time you can connect the display card back, connect the display, turn on, if the alarm disappears, the display is not lit, that is the problem of the display card, it is OK to light up, but it is not ruled out that the power supply is insufficient or damaged to cause the above faults, Because the automatic shutdown caused by the previous automatic shutdown may also be CPU overheating protection, check whether the cooling fan has poor contact or insufficient revolutions, the above two situations may burn the CPU or motherboard.

How to remove the network card.

Send it to me, dear.

What about people. Open the side panel of the chassis, use the cone to remove the fixing screws of the network card, and remove them along the direction of the network card board.

Which is the network card.

The one next to the fan.