Try a couple more discs. Have a look, make sure they're clean, there's 50 GB on each one of those discs, the bits are tiny. One thing I like about BDs is how durable their surface is, nearly impossible to scratch, so don't go easy on their wipe-down.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris