Have you tried changing the video output settings to a higher resolution (like 720p) in the Blu-Ray player's menu?
If you can't get into the menu, try holding down the FF>> button for 15 seconds while the unit is on to see if you can reset the player. (In some cases, holding down the STOP buttom may also help in a reset)
When I punch in a dvd & move the tv to the hdmi setting, I do not get the launch screen on my tv and the blu ray player sticks on "open". I have changed the hdmi cable and fooled with the connections to no avail. The tv screen says "no time information" at the top and "no signal" in the center of the screen.