I use both MacBook Pro and an HP laptops with Windows 10 on my CB Solo.
Starting with the Mac, it is easier to setup if the Mac is already running a program like PlayBack Pro which looks at what is connected to the display output connector and auto reclocks the computer to the frame rate and resolution of the CB Solo..
If you still see the black screen, go to the color section of the display tab in the computers monitor settings and try setting it to something like REC 709 color space.for the display port which should be identified as CARBONITE.
If you do not have an app open, you can force it by selecting 'detect display' in the monitor settings and change display resolution to something odd like 720 x 480 then change back to the 1920 x 1080. That usually wakes things up for me.
For the Windows PC, it is pretty much the same, but it seems less likely to automatically set frame rate and resolution, even with open apps.
You need to,go,to monitor settings and do it manually.
Note, I have also,found that running HDMI cable longer than 25ft, or having an HDMI splitter in line which is feeding another source such as another monitor, causes the black screen issue on the CB Solo.
Hope is works for you.
Cheers.
#Carbonite