The computer has no display when it is turned on. It is usually caused by hardware, connection or system problems. You can follow the following steps: ① Check the power and connection of the monitor, confirm that the socket, power cord and video cable are plugged in tightly, try to replace the socket or input source; ② Troubleshoot the poor contact between the graphics card and the memory stick, turn off the power and turn on the chassis and re-plug and clean the gold finger; ③ Try to enter safe mode or use other equipment to detect and troubleshoot system or driver problems; ④ Check the BIOS settings. If you cannot enter the BIOS, it may be a hardware failure. It is recommended to contact a professional. In most cases, the connection is loose or the contact is poor. After manual investigation, it is still impossible to solve the problem and then the repair will be considered.

The computer is turned on but it does not display, which is a problem that many people will encounter. Generally speaking, this situation may be caused by hardware, connection or system problems. Don't rush to send me repairs. Let's take a look at the following common reasons and troubleshooting methods.

Check the monitor power and connection

First, make sure the monitor is powered on normally. Sometimes the socket is loose or the power cord is off, and the monitor cannot work. You can check whether the indicator light on the monitor is on. Usually, it means that the power supply is normal.

• Check whether the monitor power cord is plugged in well, try changing the socket
• Check whether the video cable (HDMI, DP, VGA, etc.) between the monitor and the host is tightly plugged in
• If it is a dual graphics card machine, please note whether it is currently connected to the interface of an independent graphics card or an integrated graphics card.

If you are using an external laptop monitor, it may be that the monitor does not switch the input source. For example, some monitors need to manually select "HDMI" or "DP" signal source.

It may be due to poor contact with the graphics card or memory stick

Desktop users can try to open the chassis and check whether the graphics card and memory stick are loose. Especially after moving the host, the graphics card may be slightly shifted, resulting in abnormal output.

• Turn off the power and unplug it, and remove the side panels
• Find the graphics card and gently press down both ends to make sure the snap is locked
• Also check the memory stick, take it down and use the eraser to erase the gold fingers, and then plug it back

If it is a motherboard with integrated graphics card, you can also try replacing a memory stick to troubleshoot the problem.

Try to enter safe mode or use another device to detect

If the monitor looks OK but the screen is always black, try the following:

• Press and hold the power button forcibly shut down, repeat it about three times, and sometimes trigger the Windows repair mechanism
• After booting, press F8 or Shift F8 repeatedly to try to enter safe mode (different brands may differ)
• Test with another monitor or TV to rule out the possibility of damage to the original monitor

Sometimes system update failure or driver conflict can also lead to a black screen, and it may be useful to uninstall the recently installed graphics card driver into safe mode.

Possibility of BIOS settings or system crashes

In rare cases, the BIOS settings are reset or the hard disk fails may also cause no display on the power. You can try:

• Enter the BIOS interface (usually press Del, F2, F10 and other keys when powering on) to check whether the startup settings are normal
• If the BIOS cannot enter, it may be a motherboard or CPU problem. It is recommended to find a professional to check it out.
• If the hard disk has a abnormal noise or is not recognized, it may be that the system disk is damaged and the system needs to be replaced and reinstalled.

Basically these common possibilities. Most of the time it is caused by connection problems or poor hardware contact, and it can be solved by just checking it. If it really doesn't work, then consider sending it to repair. Don't suspect that the motherboard is burning as soon as you come up, as it will easily cause excessive anxiety.

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