Skype during Screen sharing displays a Black screen on Windows 10

If Skype for Business screen-sharing is not working, is blurry, or displays a black or frozen screen, then this post may help you fix the problem. The cause for this could be outdated software, a random glitch, or even a slow connection.

Says Microsoft,

Video-based Screen Sharing (VbSS) capability added to Skype for Business ensures that connection time is drastically reduced, and the screen presentation is always in sync between presenter and viewer. Not only is VbSS faster, but it also more reliable and works better in case of low network bandwidth conditions. It reduces the screen refresh rate and so at times this can cause issues for some. VbSS is only used when all participants in the meeting are using the latest version of Skype for Business client, and conference VbSS is enabled on servers where your meetings are hosted. If these conditions are met, your screen-sharing session will automatically start with VbSS. If they are not met, your screen-sharing session will automatically start with Remote Desktop Protocol (RDP) rather than VbSS.

Skype Screen sharing Black screen

If you face this issue, create a system restore point first and then see if any of these suggestions help you:

1] Update Skype

Update your installed Skype software

2] Restart screen-sharing

Click Stop Sharing. Then again Start Sharing again. If you have a secondary monitor, then use it and see.

3] Update or rollback Graphics drivers

If you recently updated your graphics drives, roll them back; else update them and see if it helps.

4] Reset Skype

Open Settings and Reset the Skype app and see.

5] Edit the Registry

You could disable (VbSS) and enable Remote Desktop Protocol (RDP) and see if that helps.

Open Registry Editor and navigate to the following key:

HKEY_CURRENT_USERSoftwareMicrosoftOffice16.0Lync

• Create a new DWORD, name it EnableConferenceScreenSharingOverVideo and set its value to 0
• Also create a new DWORD, name it EnableP2PScreenSharingOverVideo and set its value to 0

Next, navigate to the following key:

HKEY_LOCAL_MACHINESoftwareWow6432NodeMicrosoftOffice16.0Lync

• Create a new DWORD, name it EnableConferenceScreenSharingOverVideo and set its value to 0
• Also create a new DWORD, name it EnableP2PScreenSharingOverVideo and set its value to 0

Restart your computer and check.

If it does not help, you may reverse the changes or go back to the created Restore Point.