I've got it set to beep at 5,500 RPM. Haven't gone to that rev range for quite some time and when I did just a few days ago, the shift light went on but the audible beep taht goes along with it didn't. I tried changing the point when the light goes off but it's still not working. Any suggestions before I have it checked at a shop?

Maybe you switched off sound alert, check manual how to enable/disable it....

Wonder how it turned off by itself? But yeah I'll go do that :) Thanks :D