I've just bought a NAD T747. I'm running a PS3 for dvds - sound into the amp over the HDMI cable, video over the RCA cable to my TV (a normal 74cm). On other amps I set up things like this, and it worked well. With the NAD, I can't get sound from the PS3 over a HDMI cable. I can get sound on another source input, running RCA cables from a CD player. Has anyone had a similar problem, or can you suggest solutions?