Introduction
It often happens that while working on a computer or laptop—or during an important online meeting—the laptop screen suddenly goes completely black. The strangest part is that the laptop’s keyboard remains active, and if an external monitor or TV is connected, everything is clearly visible on it.
If this is happening to you as well, it means your laptop’s processor, RAM, and motherboard are perfectly safe. This issue usually arises due to a Windows software bug, the display mode getting stuck, or the graphics driver hanging.
In this article, we are going to share five simple and effective ways for you to fix this problem yourself at home, without needing a mechanic.
1. Reset the Windows Display Mode (Change Project Settings)
Sometimes, Windows suddenly changes the display settings and gets locked in “Second Screen Only” mode. To fix this:
While looking at your external monitor, press the Windows Key + P simultaneously on the keyboard.
A sidebar containing four options will open on the right side of the screen.
Click on the ‘Duplicate’ or ‘Extend’ option there using the mouse.
As soon as you do this, the display will return to your laptop screen as well.
2. Restart the graphics driver using a magic shortcut.
If the Windows display driver suddenly crashes or freezes while in use, the laptop screen goes black. There is a secret shortcut to wake it up without restarting the laptop:
Press these four keys on your keyboard simultaneously:👉 Windows Key + Ctrl + Shift + B
What happens? As soon as you press them, your external monitor will blink for a second, and you will hear a faint ‘beep’ sound. This shortcut refreshes your graphics driver in the background, instantly waking up a dormant laptop screen.
3. Check the keyboard’s display toggle keys
Often, a key on the keyboard is accidentally pressed that turns off the laptop’s main screen.
Look closely at the top row of your laptop keyboard (F1 to F12).
One of the buttons will have a symbol of a monitor or a screen on it (usually the F4, F7, or F8 key).
Try pressing that button on its own, or press Fn + [that button]. It acts as a manual switch to turn the laptop screen on or off. You should also try pressing the brightness increase button
4. Force restart Windows
If the software has completely frozen, it is necessary to fully reboot the system to clear the cache files:
Go to the Start Menu visible on the external monitor and restart the system in the usual way.
If the mouse is not working, press and hold the laptop’s power button for 10 to 15 seconds; the laptop will shut down completely.
Wait for one minute, then press the power button to turn the laptop back on. Often, the screen returns to normal after a fresh boot.
5. Check for a hardware fault (The Torch Test)
If the screen does not turn on using any of the methods mentioned above, perform a quick test to see if the screen is internally damaged:
Turn on your mobile’s flashlight (torch).
Shine a light very close to the laptop’s black screen and look very carefully.
Situation A: If you can see the Windows wallpaper or some text very faintly or dimly on the screen, it means the screen is on, but its backlight (inverter) has failed.
Situation B: If it is completely dark and nothing is visible, it is possible that the display cable (eDP cable) connecting the screen to the motherboard has come loose or is damaged. You may need to visit a service center for this.
Conclusion
In 90% of cases, this issue is immediately resolved by pressing Windows + Ctrl + Shift + B or Windows + P, as it is a purely software-based glitch. You only need to visit a technician if the “flashlight test” reveals a broken internal screen or a severed cable.