This may sound like a simple or ridiculous question-but here goes--we recently installed the new Sage 50 software and they have taken away the little 'bleep' noise when you reach the end of the line when entering payments.
I miss that noise because it would keep me on track when I am making multiple entries on one payment without having to look up constantly.
This is just a wild guess - could it be the problem is in your computer rather than Sage? I remember getting frustrated when a useful sound went away on another program, and it turned out that someone had turned off the sound on the computer!