When the Windows laptop has a black screen, the system is running, first determine whether it is just a display problem. 1. Press Caps Lock or Num Lock to see if the keyboard light is on, whether the fan is rotating, and try Ctrl Alt Del to call up the task manager. 2. Connect the external monitor and press Win P to switch the display mode. If the external screen is normal, the problem lies in the notebook screen, cable or backlight. 3. It may be a problem with the graphics card driver. After forced restart, enter safe mode to uninstall the graphics card driver or use the driver tool to restore the default. 4. Failure to power settings or hibernation wake-up may also cause a black screen. You can force shut down and restart and enter the advanced boot option to adjust the power settings or run the powercfg /reset command to fix it. 5. Others may include BIOS problems or system files corruption. You can install a USB flash drive to enter the recovery environment for automatic repair or system restoration. If it still cannot be solved, it is recommended to contact a professional to check the hardware.

Your Windows laptop screen is black, but the system is still running, which is not uncommon. It may be a display exception caused by hardware, driver or system problems. Don't rush to send me repairs. Let's take a look at the following common reasons and solutions.

1. Check if the screen is just not illuminated, not crashing

Sometimes the laptop looks like a black screen, but the system is still running. You can try the following method to judge:

• Press the Caps Lock or Num Lock key to see if the keyboard lights react. If the light is on, it means the system is still running.
• Listen to whether the fan is rotating or whether the hard disk reads and writes.
• Try pressing Ctrl Alt Del to see if you can call up the Task Manager interface (even if it just flashes).

If you confirm that the system is still running, the problem may be just on the display output.

2. Try the external monitor to see if there is any picture

This is one of the most direct ways to troubleshoot screen problems:

• Prepare a suitable cable (HDMI, VGA, USB-C, etc.) and connect an external monitor.
• After connecting, press Win P and select "Copy" or "Second Screen Only".
• If the external monitor can display normally, it means that your laptop's motherboard and graphics card are fine, and the problem is most likely on the screen, cable or backlight.

If so, you can consider contacting the after-sales service to check whether the screen cable is loose, or replace the screen.

3. There may be something wrong with the graphics card driver

Driver crashes may also cause black screen, especially after updating the driver or system:

• Press and hold the power button to force shut down, and try restarting again.
• If the screen is still black, try the external monitor again and switch to it to display.
• Enter safe mode and uninstall the current graphics card driver:
  • Right-click on "Start Menu" → Device Manager → Display Adapter
  • Right-click the graphics card device → Uninstall the device
• Then restart the computer, the system will automatically reinstall the basic driver

If you are not sure how to operate, you can also use some lightweight driver management tools to help you restore the default state.

4. Failure to power settings or hibernation wake-up may also lead to black screen

Sometimes when you close the lid and cannot wake up after going to sleep, a black screen will appear:

• Plug in the power supply, press and hold the power button for 10 seconds to force shut down, and then restart the power.
• Press F8 or Shift F8 repeatedly during booting (depending on the model) to try to enter the Advanced Startup option.
• If you can enter, you can adjust the behavior settings of sleep and sleep in the "Power Options".

You can also try running this command in a command prompt to fix power-related problems:

 powercfg /reset

5. Other possibilities: BIOS problems, system files corruption

If you have recently upgraded your system, or accidentally ordered something strange:

• You can try to use the installation USB drive to enter the "Recovery Environment" and run the "Auto Repair" function.
• Or perform system restore and return to the state before the problem occurs.

Of course, these operations are a bit complicated for beginners and are recommended to do so under the guidance of experienced people.

Basically these common possibilities. In most cases, the problem is not particularly serious and you can check and solve it yourself. If you try it all but it doesn't work, it may be that the hardware is broken. It is recommended to find a professional to check it further.

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