The BeeBrain works on bands and channels shown in the chart below:
If you are using a goggle with only one band, for example, the Fatshark Teleporter, you might not see any image in your goggle.
This is because sometimes the BeeBrain is preset with another band. And since the BeeBrain is not transmitting video signals to the Fatshark band, the Teleporter goggle will not display any image.
If you have trouble with video reception or OSD issue, you can find a solution HERE.