I see that this subject has appeared before, but I have tried all the suggestions without success. To summarise, I have a Primary desktop with links to three secondary machines on the same wired network. If I link to any of the secondaries, I get a good connection, but only see a black screen on the Primary. All the secondaries have working and connected monitors, keyboards and mice. Sending Ctrl, Alt, Backspace, has no effect on the primary display, but I can see 'Taskmanager' appear on the secondaries.
I've tried re-installing Multiplicity and disabling most other programs on the secondaries, but nothing changes.
All machines are running recent versions of Windows 10.
Any ideas please??