Started with OS 9 and Cube lost its chime

G4 Cube, OS 10.4.11 and 9.2.2 installed, 1 gb RAM.

Started it with OS 9 for the first time in a while, and ever since then it has no startup chime.

Not a terrible loss, but all the same, I generally expect it on startup, so I'd like it back. Anyone got ideas on why it's gone, and how to get it again?

Thanks