No audio for Blu-Ray disks?

[Fogg]

Hi,

I purchased a Magnavox NB500MG9 about 2 months ago.

It's been working fine for a couple months now, but today it stopped playing audio on Blu-Ray disks! The movie plays, but I get no sound.

I checked all the cables, and played around with the settings, but the problem persists.

I've tried to play Wall-E, The Prestige, and Dark Knight (the last two have worked previously) and I get no audio on any of them. However, DVD's are playing fine (audio and all).

So my question: Is there anybody who is familiar with this player/problem who might have some suggestions on how to fix the issue? Or am I just sunk here?

Thanks