I do not think the ZIP needs replacing.Install a OS 9 disk and disk utility will fix it.Just had same problem on a Quicksilver. I formatted the disk and it works perfect.When you re-boot with disc in optical drive hold C key down so it boots up on the disc and not C Drive.I always keep OS9 disc handy for repairs. RegardsKeith PS Other World Computing, Chicago. sells Zip Drives -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listserver.themacintoshguy.com/pipermail/g4/attachments/20110212/82af9648/attachment.htm>