CD-ROM drive vibration on G3 desktop Macs

Regarding CD vibration in some Power Macintosh G3 computers (desktop model): An internal Apple document (not available online and intended for service providers) describes how to identify suspect units, what action to take, and the current status of the issue.

It appears to be an issue with only a "few Power Macintosh G3 Desktop customers." The cause has been traced tovarious metal and plastic parts being moved around by the vibration of the CD-ROM drive when it is spinning. Apple notes that installing a rubber foot on the CD-ROM drive will deaden the vibration. The document provides details on how to do this.