I had a similar problem, couldn't play BD disks in my BDC-TD03RS, it was like the lens pack didn't catch a proper position to read.
...Obviosly, seems a hardware problem... So, what to do?
Play with moving the laptop! put it upside down between the time you insert the disk and the the player start working... amazingly it works! (for me at least)
I Known it's a crappy solution. But yesterday I couldn't watch a single BD and now I'm watching "The Last Boyscout"...
Good day and good luck!