Windows 10: When I connect my laptop to my monitor via HDMI both screens go black

When I connect my laptop to my monitor via HDMI both screens go black. Usually to fix this I will keep turning my laptop on and off and eventually it will fix the issue, but this shouldn't be happening in the first place. I've installed the correct graphics drivers for my laptop and it is a brand new computer. I have also tried a different HDMI cable but the issue still happens.

:)

 

Laptop monitor is black but HDMI to TV works

So, I seem to be having the opposite problem of most. After updating my laptop to windows 10 the laptop monitor basically does not work - it's as if the graphics card does not see it. When I turn the computer on it shows me the dell logo with options to
open the boot settings, and it starts to show the graphics for loading windows and then just goes to a black screen. Like others I thought maybe it's the issue with thinking there's 2 monitors when there really are not because it's acting like my dual monitor
work computer at start-up, but none of the listed fixes worked. I tried to plug the computer into the TV via an HDMI cable and that does work but the laptop monitor goes from a 'light' black to an 'off' black. Of course the computer at that point only thinks
there's one monitor which is the TV when I go into the settings. I've tried every combination of plugging in and pulling out the HDMI at different points in the reboot process but I always end up in the same place of having to plug the laptop into the TV to
use it. It's as if the Intel graphics doesn't see the laptop monitor as an option. I also tried to update the graphics drivers but it says there are no available updates. Anyone else have this problem and a suggested solution so I can move my laptop away
from the TV?!

 

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

 

Laptop screen goes black when using HDMI cable

The laptop screen goes black when I am trying to connect it to my Samsung monitor using HDMI cable.
This issue occurs when HDMI cable is plugged in