Why is my computer black when it turns on?

If there is no display, it may be that the computer is not turned on at all or the monitor is not receiving the display signal.

The computer does not turn on normally, if you press the power button and do not hear the fan in the case, it may be that there is a problem with the power supply or the power supply, replace it or take the computer city to find someone to repair. If you hear a sound, but the screen is not displayed, see if the monitor indicator has turned green (yellow when not turned on, some models may not change at all), if it does not change, then take the monitor or case to other computers to try, the computer can be turned on, it means that the case is fine, the problem is in the monitor, if the monitor can be displayed normally, it means that there is a problem in the case (check the graphics card, memory).

Is there a response from the host?,Is the host light on?。 If the monitor is broken, it is black, and if the host is broken, it is also black. It's dark without electricity.

If the host is not working properly, there is something wrong with the host; If the host is working normally, and the monitor is not displayed, then it is a problem with the monitor or the connector, you can see if the connector is in good contact, if there is no problem, check the plug next to the CPU fan, the poor contact in that place will also cause this problem, if it is not good, unplug the memory and graphics card, and use an eraser to remove the contacts!

The above are all summarized for the whole computer for your classmates, you try.

I'd be nice if you made the problem clearer.

Answer: Start the computer normally but the screen is black, and the solution is as follows:

If there is a boot **, it means that the host starts normally. That's what went wrong with the graphics card.

There are many reasons for the failure of the computer to turn on the black screen, such as the display is damaged, the motherboard is damaged, the graphics card is damaged, the graphics card is in poor contact, the power supply is damaged, the CPU is damaged, etc. For the treatment of the black screen of the computer, the method of eliminating and replacing is basically adopted, and the principle should be based on replacing and eliminating the most suspicious parts first.

1.Unplug the data cable connected to the monitor and the console, and turn on the power switch of the monitor separately. Generally, if the display is normal, it will display the manufacturer's information of the display or a prompt that the monitor is not connected, if it can be displayed normally, it indicates that the display is unlikely to be damaged.

2.Check that the exposure is good. You can check whether the contact between the graphics card and the monitor is good, whether the contact between the graphics card and the motherboard IO slot is good, and whether the contact between the memory module and the motherboard slot is good.

3.If the black screen still appears, take out the components installed in the computer, leaving only the CPU, graphics card, and memory sticks, and the cause of the fault can be limited to the CPU, motherboard, and memory. Generally, if there is a fault in the memory, there should be an alarm sound.

If the memory fault is ruled out, only the CPU and the motherboard are left.

If my answer is helpful to you, forget.