The computer host can be turned on, but it can t be connected to the display

Confirm that the monitor power supply and data cables are correct.

Confirm that the graphics card is correct (whether the console has a beeping sound when it starts).

Try a different monitor.

Check if your graphics card and cables are loose? In particular, the memory module is reinserted

If your computer is an integrated graphics card, unplug the memory module and insert it again (if the computer has not been cleaned for a long time, you can find an eraser to insert the gold finger of the memory in the original position), if it is a discrete graphics card, also unplug the graphics card and process it in the same way. Half of these problems can be solved.

Remember that there are clips on the side of the slots of the graphics card and memory, so pay attention when unplugging and installing.

Why can't it be connected?,The cable connecting the main chassis to the non-monitor is broken.,Or the power cord of the monitor is not plugged in properly.,It's possible.。。

According to the problem you said, if the cable is fine, it is the motherboard that the graphics are burned,

Check to see if the monitor cords are loose.

Is there a loose cable connecting the monitor to the main unit? Let's see if the graphics card is plugged in tightly?

Clause. 1. Check whether there is a fault in the VGA interface of the connecting cable.

Clause. 2. Check whether the power supply is insufficient or aging.

Clause. 3. Clean up the dust inside the chassis, check whether there are any foreign objects in the place of the hardware gold finger, and use an eraser to wipe off the foreign objects.

First: If there is no problem with the hard disk, it will not go back and forth from the beginning, and it will be fine if the hard disk is repaired.

Second: Confirm that the information is in that drive letter, if it is in the C drive, then you use a ghost system CD, enter the hard disk in the way of PE, copy the desired copy to another drive letter, and install the new system from Qin Bu Oak.

Third: In the case that there is no way to install and test, you can take out the hard drive and change it to the second machine to start it. As soon as the start requirements are displayed, the second screen will press F8 to selectively enter,You can complete the test whether the hard disk is broken, you can also check the system of the hard disk,Is it unintentional to start,And it may be that there is a problem with the power supply of the computer before you come back and start repeatedly。

Problem Analysis:

There are two situations when the monitor does not respond after the computer is turned on: the screen is not powered on (the power indicator is not on) or the screen is powered on but there is no signal or "no sighal", the former means that the power is not on or the power cable is in poor contact or damaged, and the latter is generally the memory module or monitor data cable is not in good contact, or the memory, graphics card, display or data cable is damaged.

Handling suggestions:1If the monitor is powered on but no signal is displayed, turn off (if short pressing the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, plug in and unplug the memory module again, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn it on after installation. If you can't do it, then it's simpler:

Palm or kick the chassis can be done (pay attention to the location: the front of the shell on the left and right sides of the chassis without an interface on the back of the shell; Attention Tract: Don't push too hard).

The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

2.If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.If the monitor is not powered on (the indicator light is not on), check whether the power switch is turned on, then check the back of the monitor, plug the power cord connected to the monitor upwards (the power cord can be replaced if possible), and check whether the other end of the power cord is powered on to the outlet.

4.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, it means that the monitor is damaged and needs professional repair.

Step 1: First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated. Step 2:

If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, and smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged. Step 3: If not, then clean the dust off the motherboard and check if the computer is in good condition.

Step 4: If the fault persists, unplug the reset cable on the motherboard and connect it with other switches and indicator lights, and then use the change cone short-circuit switch to see if it can turn on. Step 5:

If it can't be turned on, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device. Step 6:

If the fault persists, the fault may be caused by devices such as memory, graphics card, CPU, and motherboard. Then, use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal, and replace the damaged devices if there are damaged devices. Step 7:

If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can display, 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.

Generally speaking, it's not that the computer is not connected to the display. Rather, if your computer doesn't boot up successfully, in most cases, it's a failure of the motherboard, memory, and in a few cases, a failure of the graphics card and power supply. The probability of other failures is very small, recommended.

Try switching to a cable that connects the host computer to the monitor!

Let's simply tell you how to shoot it.

1: Because the current intelligent power supply system will cause if the CPU is not working properly, it will cause the CPU fan to rotate when it starts, and stop rotating after about 10 seconds (the new power supply system is like this);

2: Try unplugging the memory and then start up your computer. If you can't hear the alarm, it's a sign that there is something wrong with the motherboard. And if your graphics card can be rotated, it may be a local power supply issue.

3: Disconnect the monitor from the graphics card, (need to turn on the monitor) If there is no signal output, the monitor will go to sleep in about 15 seconds. Disconnect from the graphics card at this time.

If the monitor goes back to a prompt like Check Signal Lines indicates that the monitor is normal.

4: Remove the fan Then start the computer (handle with care) Touch the CPU quickly with your hand if you can feel the CPU heating up. It means that there is no problem with the CPU power supply and the CPU is working normally.

5: Check whether the fan is faulty. In order to protect the CPU, the motherboard of some computers will prohibit the CPU from starting when it detects that the fan is not rotating, and if it is determined that the fan is not faulty, then check whether the fan power supply is normal.

General summary Check the following parts: make sure that the display is not faulty and powered on, make sure that the CPU is working properly and that there is a temperature when running, determine whether the graphics card has a signal output, and determine whether the motherboard is working properly. If the fault cannot be found through the above methods, it is recommended that the landlord go to the maintenance department to test it, so as not to cause secondary damage to the computer.

Is the CPU fan broken? Use the CPU fan to see if it can run normally, and see if the fan cable is connected to the motherboard.

If you say no, then change the fan and decide whether you can turn it on.

Do you hear an alarm sound when you turn it on?

Remove the graphics card and reinstall it.

If that doesn't work, remove the motherboard from the chassis and reinstall it. It is most likely caused by a short circuit in the motherboard and chassis.

This kind of fault is called not turning on, or not lit.

First check why the CPU fan is not turning, whether the plug is not plugged in, or the fan is broken. If the fan is broken, you didn't notice it before, and it is possible that the CPU has broken down due to long-term poor heat dissipation. It can only be replaced by a u, and the substitution method is excluded.

Secondly, the motherboard battery is dead, the motherboard is damaged, and the memory is poor, which may lead to not turning on, and it also needs to be checked and replaced one by one.

If you don't know how to get it, find someone who understands computers to show you, but if it doesn't work, send it for repair.

The cup fan has been replaced, and your computer can't get up.

First: Change the CPU fan.

Second: change the graphics card.

Third: Change the monitor or monitor power cord.

Check the CPU and motherboard, if it doesn't work, just change it, it's as simple as that, how can there be so many tirades.

The graphics card is broken; The monitor is broken; There is a problem with the cable between the monitor and the console.