I've seen this happen sometimes on Macintosh computers, and I usually find that if I change the screen resolution, then it works normally again. You should be able to do this on your end, once connected to the remote computer, by clicking upon the 'view' menu, then selected 'screen resolution' and change it there to some other settting (make a note of the original setting in case you need to change it back). Then, the screen changes from black to a normal viewable screen
Because there are many reasons to make this happen, could you please clarify some basic details like:
Is there any case that you are trying to:
Also at this post please give attention to Esther's replies.
I would recommend you take a look at these posts and also to this post (according to a black screen) and to clarify all the above details, please.