Windows 10: ASus m16 laptop screen flickers to black, but external monitor works.

My asus laptop monitor suddenly went black. I tried everything, but only an external monitor can show the screen. During changing fps, the laptop screen flickers for a while but back to black. The other days, only the external monitor was showing in my device manager and display settings, but today even my laptop monitor is being shown thereprobably because i hadnt used it in a while, in both the settings and device manager shows both integrated monitor and the external monitor. yet the screen is black. i have hard reset, reinstalled windows, and everything, but even the bios screen or safe

:)

 

Screen flickers and goes black

Nothing worked thing is i flickers a bit then turns black on the computer screen but doesn't flicker or go black on the monitor also when i restarted my computer and got to the home page it went black again i tried the 2 videos im trying the steps below rn

 

Laptop screen will only work once it has been connected to an external monitor, even if that monitor is switched off

Having an issue whereby I cannot see or use the Laptop screen without first plugging it into an external monitor.

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  Upon Windows startup unconnected to any external monitor
  
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    DELL opening logo can be seen on Laptop screen
    
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    Screen goes black with backlight
    
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    Mouse pointer can be seen onscreen if moved to the right, as though a second monitor is connected on the left hand side.
    
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    Attempting to press enter and type in password in the correct order as though the screen was functional does not do anything
    
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  Upon connecting to an external monitor (even if switched off)
  
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    Laptop screen will suddenly appear, all functionality restored
    
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  Upon disconnecting again from external monitor
  
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    Laptop screen remains visible and functional
    
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    Lock screen /unlock screen no problem
    
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  Upon shutting and opening the laptop lid
  
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    Screen black with backlight, same results as windows startup, mouse pointer can be seen and moved as though a second screen is connected on the left
    
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    No functionality until reconnected, even for a second, with an external monitor.
    

Troubleshooting:

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  Restarting multiple times, checking multiple display screen is not activated:
  
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Please how do i fix my windows 11 black screen, split at the top, often flickering as well? Sometimes the laptop screen comes on. Works fine when connected or projected to external screen / monitors

Please how do i fix my windows 11 black screen, split at the top, often flickering as well? Sometimes the laptop screen comes on. Works fine when connected or projected to external screen / monitors