When I still had my old $400 Kenwood AV 5.1 receiver and my $400 RCA DVD player I would have the audio drop out for a split second while watching movies. If I went back over the same section on the DVD a second time it worked fine. No interruption in video though. The digital audio output from the DVD player was connected via a coaxial cable. Let's say this was really irritating. The kind of irritating that required counseling to cure.
When the RCA died I bought a $90 Apex DVD player. I figured I'd buy a cheap one and it would last for ever. It too had the same problem. I figured it must be the Kenwood receiver. It too was connected via a coax. I did not have any spare optical cables/connections available at the time.
Then I upgraded to my more expensive HT setup. I replaced every single AV component, wire, cable, TV stand, etc. Except for the Apex DVD player. Guess what. Same problem. Now I thought it was the player. Even though the RCA exhibited the same problem. I mean, I just spend enough cash to buy a car with on my HT, so there is no way the problem lies there.
When the Apex died I bought a $100 Toshiba DVD player. It did not last long. I think I killed that one with a screw driver through the DVD mechanism. Then I got a $120 Sony DVD player. Same problem. I promptly put that player to it's grave too. I have a lot of spare remotes.
Since then I bought myself an Onkyo and a Yamaha DVD player. I never had that problem again.
Any ideas out there?