Windows 10: when i connect my monitor with a laptop they both show black screen but some time before...

when i connect my monitor with a laptop they both show black screen but some time before they work very well now what should i do

:)

 

Toshiba Laptop Black Screen

I have a Toshiba Laptop, Was reinstalling windows 7 on it last night left it doing the updates then shut it down. Turned it on this this afternoon only to find the laptop screen is Black and also there is a burning smell coming from the Fan.

I connected the Laptop to a external monitor that is fine, Can go into bios, Windows boots up fine Etc.
Just took apart the laptop earlier to check all the cables where in correctly, Checked the motherboard over for any damage, burnt bits but but found nothing. Just put it back together now but im still getting this burning smell and i still cant use the laptop screen only a external screen.

I Tried Pressing FN+F5 to switch to the laptop screen, But still black screen. Any Suggestions please ?

Thanks

 

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
    
  • 
    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.
    
  • 
    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
    
  • 
    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
    
  • 
    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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Blank Screens x 2 if Ext Monitor connected via HDMI

Dell Inspiron 17, 5000 series, Windows 10, fully up to date re Updates etc. Recent purchase

Recently, 3 of us got together, as we do regularly, each bringing own laptop along. I also take a monitor so we can all see the same thing, ie a tutorial. This arrangement seems to work well and I don't have issues.

However, when another (friend's) laptop was connected to Ext Monitor via HDMI cable (to show something on his laptop for all 3 of us to see), clicked on 'Duplicate', (first time setting up with Monitor) his laptop screen went blank but the Ext Monitor wouldn't display his screen either, just black too.

The laptop screen came back on when the HDMI cable was unplugged!!! Clicking on different options re Ext Monitor had no effect.

As mentioned, we'd had no problem with my laptop screen displaying on the Ext Monitor, using same cable, plus another longer) cable.

We tried the relevant Fn Key, Settings-System-Display but couldn't see any settings to change. With the Ext Monitor not connected, there was no way to try clicking on 'Identity' or 'Detect' but, if connected, both screens are just 'black'. Surely, it must be down to a setting somewhere ... ??? *Wink

Apparently, same happens when this laptop is connected to TV although 'old' Dell laptop was fine when connected to TV.

Has anyone any suggestions, please? Any help/advice would be much appreciated

Many thanks