I have a 950 that I've had for about 8 years. It's been working flawlessly until recently. No matter what the source, if I'm using an optical audio input, the signal keeps dropping off. It will go in and out of Dolby digital to the point where I can't listen anymore. I've tried swapping cables, and changing inputs, but it just keeps happening. So far this has happened on a Blu-Ray player, Media player and a PS3. At this point I'm desperate as I do not want to have to replace or repair this unit, but I'm out of ideas. Anyone else had something similar happen? Any ideas for a fix, maybe a firmware update or something? Any help is greatly appreciated.

Thanks!