It's definitely not cable related. I unplugged the HDMI cable from the receiver and plugged it in directly into the WD Media player and voila, had a picture on my projector. I tried connecting different devices into the reciever and none would display and image, though I had sound.
The Yamaha HTR-6150 only comes with one HDMI output (and two HDMI input). I did try both HDMI input ports but the problem remained though the receiver seemed to detect the presence of an HDMI component. All this leads me to believe that the problem is related to the HDMI output.
I did not test other non-HDMI output ports on the receiver. My projector is too far away to be used for testing but I will try hooking it up to my TV via the S-Video or Component hookups.