So my friend's DW1640 decided to kick the bucket and hard locks his system whenever he puts in a disc. So we called them with SkypeOut, and god, but their hold music sucks!
It's their own company music: http://www.benq-eu.com/news/?year=2003&id=435
The good news is that, their customer service seems to be good so far, after a long hold time with that ridiculous music.