Ask for help when the host fails, power on the CPU fan turns, but the screen does not respond

The computer is turned on just the fan, the display does not respond, and there is no alarm sound, 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 on the keyboard.

The light is on, indicating that the graphics card, monitor, and other hardware are faulty.

2. If the keyboard light does not light up, it means that it is a memory, CPU, motherboard, or power supply problem.

Solution: 1. If the keyboard light does not light up, first wipe the memory module with an eraser, and check whether the gold finger of the memory module has any burnt marks.

Replace the memory in the slot.

2. Check the capacitors and resistors on the motherboard to see if the capacitors are bulging, whether there is a burning smell on the motherboard, and clean up the dust on the motherboard.

3. Remove the CPU fan, power on and turn on, test whether the CPU has a temperature change by hand, if not, the CPU is not working, either the motherboard is broken, or the CPU is not plugged in properly, and the CPU is re-plugged.

4. Power supply problem, although the power supply is powered on, but the motherboard can not work normally, replace the power supply and try it.

5. If the display card is loose or oxidized, the keyboard light will be on, the screen will not be displayed, wipe the gold finger of the graphics card with an eraser, and check whether the capacitance on the graphics card is bulging.

6. Minimize the test method, only leave the power supply, motherboard, CPU, memory, graphics card, keyboard, monitor, unplug all the wires on the rest of the motherboard, use a screw knife to short the switch pins, if normal, add the rest of the hardware, piece by piece, until the cause of the problem is found.

It's possible that the monitor is broken, and the power supply and motherboard are fine.

The motherboard fan rotates but the monitor does not respond, hello, 1. The monitor is powered off, or the display data cable is in poor contactSolution: Check whether the signal cable and power connection of the monitor are normal, and reconnect the display and graphics card cable (replace a VGA cable). 2. Graphics card problem (not plugged in well or gold finger oxidation) solution:

Remove the graphics card, wipe the gold finger of the graphics card with an eraser, and then reinstall and fix it. 3. Power supply problem, whether the power supply is insufficient 4. Motherboard problem solution: the motherboard is damaged and cannot be repaired, and it is necessary to find professional maintenance personnel for inspection and maintenance.

5. Solution to monitor damage: connect the monitor to other computers to try, if it cannot be used normally, the monitor is damaged, find a professional maintenance personnel to detect and repair. Note:

To find the problem, be sure to do a good job of anti-static. The electrostatic electrode is easy to damage the integrated circuit, so before installation, it is best to touch the grounding conductor with your hands or wash your hands to release the static electricity that may be carried on the body. I hope my answer is helpful to you, and I wish you good health and a happy mood!

1. If the display does not receive the ** signal from the host, the black screen will enter the energy-saving state or display no signal (if there is an integrated graphics card and a discrete graphics card on the host, try to insert the discrete graphics card).

2. You can try to replace the normal display first, if it is the same, you can eliminate the problem of the display.

3. Press the Num Lock key on the keyboard, if the Num Lock light does not change, it is generally caused by the failure of the host to start, please replace the memory, power switch, CPU, graphics card and other hardware to find out the faulty hardware.

There are two possible reasons for this, one is that the memory may be broken, and the other is the motherboard.

The computer won't turn on, the host light won't turn on, the fan is spinning, and the monitor doesn't respond is usually caused by one of the following reasons:

Power supply problems: This can be caused by a power failure or a poor power cord connection. In this case, the main unit light doesn't light up and the fan doesn't spin strongly, because the motherboard doesn't get a stable power supply**.

Graphics card issues: If you use a discrete graphics card and there is no integrated graphics card on the motherboard or the integrated graphics card is broken, then it may cause the display to have no signal and not display properly.

Motherboard failure: A damaged motherboard or a device that isn't plugged in can cause your computer to not boot properly or cause unusual conditions such as beeps.

Here's how to fix it:

Check if the power supply is working properly. You can check whether the power cord connector is loose and whether the host can change a power supply for testing, etc., to confirm whether there is a problem with the power supply itself or the power cord.

If you're using a discrete graphics card, you can reseat it to make sure it's well connected. Or try replacing your graphics card or using the integrated graphics card that comes with your motherboard, if you have one, so you can troubleshoot the graphics card.

If you are not sure if there is a problem with the above two points, you can try to reconnect the hardware device to check that the components of the burned chain, memory, and data cables are connected correctly. If it doesn't fix the problem, you may need to replace the motherboard.

It is important to note that the power supply must be disconnected when operating the computer, as this may lead to serious safety issues. If you are not familiar with the operation of computer hardware repair, please seek professional help.