Hi, I have recently purchased a High Def decoder for my DSR-4800 receiver. I have connected the ASI output from the receiver to the decoder. I have connected the output of the decoder with RGB cables to my TV. I get no picture, not even a splash screen. The unit powers up fine and I can hear the clicking as it is aquiring the signal. The output on the back are 2 rows of analog video with 4 each BNC type connectors. Top row (from L to R) is H-SYNC RED GREEN BLUE. Second row is V-SYNC Y Pr Pb. I tried both top and bottom row, but did not hook anything to the H-SYNC or the V-SYNC. Are a 4th or 5th wire necessary? If so will I need an adapter or converter to connect my TV? Can't find and easy (or inexpensive) solution like a RGBHV to RGB adapter. Thanks in advance for your help.