Again - this doesn't address the point that you cannot 'see' the remote computers screen in ScreenConnect if the monitor is simply turned off. 

Eg, right now my Windows 11 box at home has its monitors turned off but is left running 24/7. If I remote into it via ScreenConnect right now I'll get a Grey screen on this end. I can even click randomly on the grey and it will click and run button and icons on the actual PC and launch stuff. Get someone to physically turn the monitor ON and hey presto - remotely display works fine in ScreenConnect.

For the same reason - I have to leave my work monitors on 24/7 so I can remote into my work machines if I need to from home/working elsewhere. 

These are not 'Headless Machines'. They already have video cards and monitors plugged in ... ScreenConnect just displays a Grey Screen on Connect to them IF the monitor is turned off on that device.

This issue only started a few versions ago, worked fine with monitors off before then.

It's been over 4 years since the thread was started - safe to assume they don't give a **** ... 

Yes, this is 'bloody annoying'. The amount of times I need to get a client to reboot for the screenconnect service on the device to reconnect is frustrating at times

Just started running into this issue with a number of Windows 11 Desktop PC's ..well similar ... if the monitor (or monitors) plugged into the Desktop PC is turned OFF - I get a grey screen when I connect via ScreenConnect ... and it's clickable, i.e. I can actually click the desktop elements of the client PC, just not getting the desktop showing to me on my end.

Reboot - doesn't fix it
Blank Guest monitor, then unblank it again - doesn't fix it
Re-installed video card (including my own nVidia 2060 at home!) - doesn't fix it
Ask someone to run over and physically turn the attached monitor on and BAM! ScreenConnect works fine. 

This is getting a tad annoying