The host is turned on, the computer display screen is not lit, what is the problem with the red ligh

This situation is generally a problem with the graphics card. You take the graphics card off and reinstall it. If it's an integrated graphics card.

Words. Take off the data cable of the monitor and plug it back in. If the computer failure is not Windows lag and the software is running slowly, it is generally a hardware problem, but under normal circumstances, the hardware is not easy to damage.

It's nothing more than poor contact and not well plugged in. Just remove it and reinstall it, and the general problem is solved.

The host is turned on, and the computer display screen is not lit, which means that the power is on and the power supply is good.

The fault red light can check the problem of the corresponding hardware, and each debug light corresponds to the problem of a certain hardware.

If the buzzer on the motherboard does not sound, then there is a high probability that the memory problem can be ruled out.

The rest is left with the motherboard or CPU, and the probability of CPU failure is not as large as that of the motherboard.

As for the judgment of the graphics card, look at the caps lock light of the keyboard after booting, if it can be turned on or off, it means that the computer has self-tested but does not display, and it is likely to be a problem with the graphics card.

1.Check whether the monitor and the main unit cable and connector are connected;

2.If the external monitor sees that the system has started normally, then you can check whether the switch button above the keyboard for turning off the power supply when the display is closed is normal;

3.If the external monitor and the pop-up display power-off switch are all right, the display cannot be displayed, then it may be a system problem;

The host is turned on, and then the computer display is not lit, if the fault is red, turn it off and restart, try it, unplug it, turn it off, and try to restart.

The host turned on the computer display screen is not lit, what is the problem with the deliberate failure red light, this should be repaired on the famous professional store, because they have friends who understand the computer, and they know what skirts they have, only they understand, we slowly go to the big guarantee, he will send this.

The computer is broken, and the only way to do it is to replace the motherboard.

The computer won't turn on the solution:

1.Check whether the monitor and the main unit cable and connector are connected;

2.If the external monitor sees that the system has started normally, then you can check whether the switch button above the keyboard for turning off the power supply when the display is closed is normal;

3.If the external monitor and the pop-up display power-off switch are all right, the display cannot be displayed, then it may be a system problem;

4.If you are unconditionally connected to an external monitor, please reboot it and pay attention to whether the display screen is black at the beginning of the system boot in the DOS boot state. If the screen is also black when the DOS boots, and there is no normal self-test sound, it is mostly a system failure;

The startup disk may be set up incorrectly. Solution: Modify the hard disk mode. Boot up, press F2, F10, F12 Delete (depending on the motherboard) to enter the BIOS, and set the first boot disk as a CD, floppy disk or U disk to a hard disk (harddisk);

6.HDD MBR error can be reset with DiskGenius;

7.Check whether the optical drive, USB flash drive, floppy disk, etc. are inserted, if so, you can take them out and try to turn them on;

8.Enter the BIOS, modify the hard disk mode, set different modes and try to restart to see if it can boot;

9.Press F8 to enter the mode, and select the latest correct configuration or normal startup.

10.If none of the above methods can be solved. For desktop computers, please disassemble the case, unplug the hard disk cable and reconnect it, and then see if it can be started; During the boot process, listen to and touch the hard disk with your hands to see if the rotation is normal;

11.The one-size-fits-all approach: reinstall the system.

If the main unit indicator light is on or off, 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" is displayed, the former means that the power is not on or the connection is poor, and the latter is generally the memory module is not in contact or the graphics card is damaged. You're moving your computer around, causing it to come into poor contact.

Recommendations: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 don't know how to operate, then it's simple: kick the chassis with one kick (note the location: the front of the shell on the left and right sides of the chassis that has no interface at the back).

If it's a notebook, you can't kick it, but it's the same for other operations.

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, then consider the graphics card 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 look at the back of the monitor, plug the power cord connected to the monitor upwards, and check whether the other end of the power cord is powered on to the socket.

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, the monitor is damaged and needs to be repaired.

If the computer's host light is not red, then the monitor will definitely not turn on, and I don't want to use it anymore, I must like to use a good monitor.