Oh my god, another CMS external drive? That's the second one I've heard about this week.

Don't touch those dip switches. Even I don't remember how hey worked but if it worked before you touched them, they are the least of your problems, same with termination.

Are you able to get to the WECOME TO MACINTOSH screen, or is it getting to the happy mac and then going back to a blinking ? floppy disk? If the former you can try holding the shift key at boot to turn extensions off. Failing that, the Finder or another system file somehow got trashed and you need to reinstall.