zonzi:
THE_FORCE:Another thing - is your LCD 1080p or 720p ?
1080p sony bravia 40 kdl2000
The 2000 series are older generation Sony sets, and you haven't posted the full model number. You've missed out the all important letter ! If it's a W or X series then they'll be 1080p. If it's a U or V series then they're only 720p which may be where the problem lies.
Try connecting the PS3 directly to the LCD so you get a picture. Go into the PS3's Display Settings, and make sure that the 1080p box is 'unticked'. Once this is done, try connecting it back up as you did before through the Yamaha and see what happens.