Laptop external monitor display does not light up

The external monitor of the laptop does not light up when it is turned on

The adapter power supply of the laptop is one of the main reasons for the black screen of the computer. Because there is no power input, the host and the LCD screen are both Can't work, so black screen. Solution: Replace the notebook adapter and it will be OK.

The monitor does not light up after the notebook is connected to an external monitor via HDMI. It may be because the screen selection is not set properly. You can press the shortcut key on the keyboard: Windows key P key, and select "Copy Mode" or "Extended Mode" in the setting. That’s it. When there is a problem with the data cable or socket, the display will not light up.

As shown in the picture below, the monitor has been connected to the laptop, but the monitor screen is black and unresponsive. First check whether the circuit is damaged and whether the interface is loose. Unplug the circuit and reinsert it. If it still doesn't work, restart the computer and wait until it restarts to see if it is displayed.

The monitor does not light up when connected to the computer. Generally, there are the following reasons:\x0d\x0aThe computer memory is loose or not plugged in properly, causing the computer startup screen to not display. Just plug and unplug the memory again to confirm that it is plugged in properly. .

What to do if the computer screen does not display when connected to the monitor

Depending on the situation, you can change the cable or use another power source. Check the signal source: If the cable is connected but the monitor still does not display an image, you should check the settings of the input signal source. Make sure your computer or device has the video output properly connected to your monitor.

There could be many reasons why your laptop external monitor is not displaying, here are some possible solutions: Make sure the external monitor is properly connected to the laptop and is powered on. You can also try changing the connecting cable. Check that the laptop's display settings are configured correctly.

Check whether the cable is plugged in properly and confirm that the cable is not damaged. The monitor input signal source is wrong: Check whether the monitor correctly selects the signal source connected to the computer. Typically there will be a button or menu on the monitor to select the source.

Why does the monitor not light up when connected to the computer?

1. The computer memory is loose or not plugged in properly, causing the computer startup screen to not display. Just plug and unplug the memory again to confirm that it is plugged in properly. The computer monitor power is not turned on. Just make sure the monitor power is plugged in and turn on the monitor power switch.

2. It may be that the video cable between the monitor and the host is connected incorrectly or the video cable is loose. The computer monitor has a black screen with no signal and no signal input.

3. As shown in the picture below, the monitor has been connected to the laptop, but the monitor screen is black and unresponsive. First check whether the circuit is damaged and whether the interface is loose. Unplug the circuit and reinsert it. If it still doesn't work, restart the computer and wait until it restarts to see if it is displayed.

What to do if the external monitor of your laptop does not display

1. Check the connection cable: First, make sure the connection cable is working properly. Make sure the cable is plugged in tightly and is not loose or damaged. Also check whether the type of cable is compatible with the interface of the laptop and external monitor. Check the external monitor: If there is no problem with the connection cable, you need to confirm whether the external monitor is normal.

2. Operating computer: Huawei MateBook If not, open Control Panel and click Hardware and Sound.

3. There are many reasons why the display screen does not display when the computer is connected. Most of them are problems with the display screen, so first check whether the display screen is damaged, put the display screen on another computer or replace the computer. A new display to see if it works properly.

4. Check whether there are hardware problems with the computer interface, connecting cables, and external monitors. If not, open the control panel first and click on Hardware and Sound. In Hardware Management, click Device Manager. Check the monitor options of your computer to see if it has its own hardware. If not, you need to recheck the hardware installation.

5. If the external monitor of the laptop does not respond, try the following methods: Output port switching problem: Some laptops may need to switch the video output settings. Generally, certain keys among FN+F1~F12 are used as switching keys.

What is the reason why the laptop display does not light up?

If the power indicator light is on and there is air blowing from the cooling fan port, but the display is still black, this situation is mostly caused by a circuit failure or hardware failure inside the notebook. , such as loose memory modules inside the notebook, graphics card failure, and display panel failure, etc.

The reasons why the laptop display does not light up are as follows: First check whether the power supply connected to the laptop is good and whether the power indicator light is on. If the power indicator light is on and there is air blowing from the cooling fan outlet, but the display is still black, this situation is mostly due to a circuit failure or hardware failure inside the notebook.

Graphics card hardware failure. The graphics card is the source of all display output of the computer, so there is a problem with it and no display can be seen on the screen. If the graphics card is broken, the average user cannot solve it. They can only find a computer after-sales service to solve the problem. If your laptop is within the warranty period, you can take it for free inspection and repair.

What to do if the laptop external display does not light up

Check whether there are hardware problems with the computer interface, connecting cables, and external monitors. If not, first open the control panel and click on Hardware and Sound. In Hardware Management, click Device Manager. Check the monitor options of your computer to see if it has its own hardware. If not, you need to recheck the hardware installation.

Check the connecting cable: First, confirm whether the connecting cable is working properly. Make sure the cable is plugged in tightly and is not loose or damaged. Also check whether the type of cable is compatible with the interface of the laptop and external monitor. Check the external monitor: If there is no problem with the connection cable, you need to confirm whether the external monitor is normal.

Check the monitor of the computer options to see if it has its own hardware. If not, you need to recheck the hardware installation. Return to the properties panel and adjust the refresh rate to be consistent with the external monitor.

Check whether the graphics card driver is updated. Whether the HDMI cable used is a good brand cable. If the computer has been connected to a monitor, whether to set it to dual-screen display. Check whether the HDMI port of the projection is OK. You can try it on someone else's computer. If it works, you can troubleshoot the problem with the computer. Generally speaking, it should work just fine once you plug it in.

First check whether the contact is good. ∩Check whether the contact between the display card and the monitor is good, and whether the contact between the display card and the motherboard IO slot is good. If necessary, remove it and reinstall it. Once, make sure the installation is in place and the contact is good.

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