Help me troubleshoot HK AVR 247 vs BD350

[Lunger]

Long time lurker here, could use some help now. Trying to figure out if my problem is my receiver or Blu Disc player. Have an HK AVR-247 and Sony BD350. Threw in a rental Blu last night and there was popping in the front and rear channels and the voice track would cut in and out. Picture is just fine. I updated the firmware on the BD350 then tried 3 other Blu's... same thing (surround mode is PCM on all). Threw in a DVD in the BD350 and it worked just fine on the Pro Logic mode. Put the same DVD back in this morning and it came up on PCM and wouldnt work, now no sound at all. Tried another DVD, no sound either. Tried to select another surround mode on the 247 but it wouldn't change. Sound from my DirectTV comes through just fine (and isn't this PCM too?). Seems to me its the receiver, but since sound is fine through my DirecTV I'm confused.