about that model receiver, I would say yes. If your receiver has optical audio inputs or coax audio inputs on the back, and you have matching outputs on your DVD player, then yes you can still get 5.1 surround sound. That is if your receiver is 5.1 or higher, which I assume it is. Just get a coax audio or optical audio cable and connect the DVD player to one of the aforementioned inputs. You could do the same with your cable or sat box to get 5.1 surround when watching TV.
If you do not have either of these kind of matching inputs and outputs, you could still get surround from your typical left right (red, white) audio cable, run from the player or box.
You don't need a new receiver to get surround but you may if you want to take advantage of the best sound via your HDMI hook-up.
Is this possible? Connecting my HDTV with DVD player (HDMI cable) to my old SONY STR-D565 A/V receiver and still get a good surround sound.
Went to Best Buy and Circuit City and they suggested to replace the old receiver and no other way. Any suggestions or comments? Thanks!