I have a Panny DVD-S35 and it tends to be selectively noisy. I don't have any problems with a slightly noisy player, but this one isn't consistently so. Say I pop in the same DVD, and let it start up a bunch of times. On some startups, it's quiet. On others it's noisy. Just a slightly loud whirring noise. No problems with visual quality, even when it's being noisy. Any ideas? Is this a sign of a problem about to occur, or should I just ignore it? Thanks!