There isn't a way to disable the chime. I've seen a couple people mention that they'd like to get rid of it, but that's not possible on that, and several other models. We did - at length - look at how to adjust that, and there is no setting that I'm aware of that will disable the chime.
Hi - my Samsung DVD V9800 plays an incredibly loud chime whenever I power it on (rattles the speakers, alarms the pets and scares the bejusus out of me every time!). I rush to turn down the volume, then I wait for the DVD to load and I have to turn the volume back up so I can hear the movie. There must be a way to control the volume of this annoying chime, or better yet, turn it off. I've searched the owner's manual and the FAQ board to no avail. Please help!