What's the matter with desktop computer host indicator light not on and unable to turn on?

What’s the matter with the desktop computer host indicator light not on and unable to turn on the computer?

There may be two reasons for the failure: the first is that the monitor or host power supply is not plugged in properly, check whether the plug is firmly connected; the second may be that the signal interface between the monitor and the motherboard is detached, you can try to replug and unplug the interface. Make sure the connection is secure.

Common causes of failure are as follows. In fact, this fault can be divided into two situations: one is that the CPU fan rotates but the screen remains black after the computer is turned on, and the other is that the CPU fan does not rotate when the power button is pressed.

Solution:

1. Check whether the power and restart buttons are physically faulty. The most common problem is that the computer cannot be started up when pressed. If this problem occurs with either of the two buttons, it may cause the computer to fail to boot normally. The only solution is to send it for repair or replace the chassis, because the chassis is integrated inside the chassis and is difficult for ordinary users to repair.

In order to solve the problem that the computer cannot run normally, you can try to open the case, unplug the motherboard BIOS power supply, wait for a while and then press it again to see if normal operation can be restored.

Extended information:

No display on startup fault check process:

1. You can hear a "beep" sound when turning on the computer (normal startup sound).

When the host starts normally, if there is no display, first check whether the display power supply is normal, and then check whether the data cable is loose. If there is an integrated graphics card or a discrete graphics card on the motherboard, you need to confirm the correct insertion.

To troubleshoot a graphics card failure that may be causing the problem, you can check to see if the graphics card is loose or oxidized. If it is an integrated graphics card, you can also check whether the memory is normal. Try reseating the graphics card or memory to see if that resolves the issue.

How to set the computer connection indicator light

Solution to the computer not turning on:

1. Check whether the monitor and host cables and connectors are connected;

2. If the external monitor shows that the system has started normally, please check whether the switch button above the keyboard is normal. This button is used to turn off the power supply when closing the display.

If the external monitor and the pop-up display power-off switch are normal, but the monitor cannot display normally, it may be due to a system problem. In this case, you can try the following workarounds:

4. If an external monitor is unconditionally connected, please restart the computer and pay attention to whether the monitor screen is black during the DOS boot state at the beginning of system startup. If the screen is black during DOS boot and there is no normal self-check sound, it is mostly a system failure;

5. If the BIOS boot disk setting is incorrect, the solution is to modify the hard disk mode. When booting, press F2/F10/F12/Delete (the specific key position depends on the motherboard model) to enter the BIOS setup interface, and set the first boot disk to the hard disk (Harddisk) instead of a CD, floppy disk or USB flash drive. This can solve the problem of incorrect startup disk settings.

In order to solve the hard disk MBR error, you can use the DiskGenius tool to reset the MBR.

In order to help players who have not passed the level yet, we can try to check whether the optical drive, U disk, floppy disk, etc. are inserted. If there are any plugged in, try taking them out and then trying to power on again. This may solve some problems.

In order to help those players who have not passed the level yet, I suggest you try to enter the BIOS and then modify the hard disk mode. You can try setting a different mode and then restart the computer to see if it starts successfully. This method may solve the problem you are encountering.

In order to help those players who have not passed the level yet, I provide you with a method to solve the puzzle. While in game, press the F8 key to enter mode, then select Last Known Good Configuration or start normally. This method can help you solve the problem and continue playing. Hope this method is helpful to you!

If none of the above methods can solve the problem, for desktop computers, you can try to disassemble the case, unplug the hard drive cable, and then reconnect it to see if it can start. During the startup process, you need to pay special attention to the sound of the hard disk rotating and touch the hard disk with your hands to see if it is running normally. These actions may help resolve the issue.

11. Universal method: Reinstall the system.

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