Here is a thread with an issue similar to yours:
http://www.avsforum.com/avs-vb/showthread.php?t=1084682I don't know if it will help you, but it does sound like a software issue rather than hardware.
Does your G74SX ODD play DVD video?
Are you attempting to play the disc on a TV, second monitor , or your laptop display?
What software/version are you using to play the Blu-Ray disc?
Did you choose the correct disc format in this software?
Have you tried any other Blu-Ray playback software?
Since you just got a new system, I'd be tempted to go to the retailer (if possible) with some Blu-ray discs and see if they play on the display model. If yes, see if they will exchange your system for another one without the issue.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT