Yes I get
Video Composite InputSource1
as my first entry. And the first entry is what it tries to show immediately after Scan Channels.
I end up with sound and a black picture
So, if you double click on "Channel 36" there will be sound Channel 36, but there is just no picture?
Please try Options->Configure TV from the right-click menu. In the dialog window that appears, experimenting with the items in the "Advanced Properties" window by selecting an item and clicking Configure button (or simply double clicking the item).
For example,
open "Video Preview Pin ...", and make sure "Color Space / Compression " is YUY2;
open "Video Crossbar ..." and make sure "0:Video Decoder Out" is selected in the Output Combobox, and "1:Video Tuner In" is selected in the Input Combobox;
and open "TV Tuner..." and make sure all settings are correct there (Is the channel number correct? Is Antenna or Cable selected correctly? Is Video Standard correct?).