Grandtec Ultimate2000 PC2TV Y-cable?

[payayom]

Does anyone know the pinout of the VGA in/out cable used with this TV encoder? I tried e-mailing their tech support to no avail. The PCB is multi-layer so it's really difficult to trace. I've tried making a custom cable for the VGA in by connecting just the Red signal+ground and the 2 syncs+ground to the 'usual' pins but got nothing. Not sure if I didn't get the syncs right or I got a couple of dud units. (Got them from a surplus shop, hence the lack of cable)