Unfortunately Larry is no longer with TI.
I don't know anything about the DM EVM but you first need to check that one of the SOG inputs to the TVP7002 is connected to the green channel. I would then probe the SOG output with an oscilloscope to make sure that the correct SOG input is selected and that the sync slicer is configured correctly. I would also probe the H & V sync outputs to make sure all slicing is occurring correctly before moving on to alignment and/or color checks.
BR,
Steve