Rob,

When I hold the power button in for a few seconds, the player shuts down and the led glows, I guess that means it's going into standby? That is what causes the two thumps. When i press the power button again, it comes out of standby, so I guess it's workng correctly.

Tony,
Sorry to mis-explain the situtation, this thumping is new, it never did it before. It started about a week ago...

Never had any audio problems before last week, just a few misc things with dimmers and the like like...