How can I get a picture from my HDMI cable?

I have my PS3 hooked up to my TV with an HDMI cable and to my receiver with the standard A/V cable (for surround sound). I can play games fine. When I try and play blu-ray discs, I get sound (through the receiver) but no picture. Any ideas? Thanks.

• Answer:

  I think your problem is that you are outputting Video for Blu ray via the A/V cable rather than the HDMI. I don't think you can output Blu Ray this way. There are settings for this in the system setup/Video and system setup/Audio within the PS3. The video may be set wrong. Set your Video Output to HDMI and the Audio to the A/V cable - even better output the audio via the optical or HDMI if your A/V reciever can take either.