Could be your HDTV's RGB and AVI ports are likely just not compatible with the older format. Same thing with mine, can't hook up my N64 or PS2 because the image doesn't come through properly. Is it and LG? Other HDTV's might be compatible, I have a different smaller HDTV which works just fine (although hooking in a non-HD console to an HDTV makes the graphics look something awful).