Advice on powering up a N40 external with a Mac SE

Hey everyone,
My dad's first computer was a Macintosh SE. Sometime in the 1990's, the computer went kaput, but we were able to find a replacement. Well, unfortunately my dad is no longer alive, and recently my mom began thinking about selling the Macintosh since we no longer use it or really need it.
We do have some personal documents that we need to remove from the computer, but they are all stored in the Microtech N40 external hard drive my dad had. Up until now, it has worked fine. However, when I attempted to turn it on with the SE the other day, nothing happened.
I remember my dad telling me one had to turn on the SE first before switching the N40 on, but I made the mistake the first time of turning on the N40 first before turning on the SE. Nothing apparent happened, but the N40 did not turn on then, or in subsequent tries when the the system was turned on correctly.
Basically, I am wondering if there is something wrong being done, or if the N40 can be "reset" in any way. I sadly do not know much about this older Macintosh model, resulting in no knowledge of troubleshooting. We do have an Apple store that we can travel to if needed, but if we could get the information off of the N40 before traveling, that would be awesome.
Thanks to anybody who can help.

The terminator goes onto the unused port while the other port is used to connect the drive to the computer?
Correct. The Terminator "ends" the Bus, reduces echoing, and pulls signals back to the "inactive" voltage range.
If necessary, do you think there is any way to get another fuse?
It is likely to be a very common type available (in the US) at places like Radio Shack, or similar vendors worldwide. The rating of the fuse will be stamped or inked on the body or the metal ends.
should the type of On/Off switch matter? *It's a rocker
The switch type only matters if it never occurred to you that a "push once for on, again for off" gives no visual indication of its ON/OFF state, and must be fiddled with to be sure it is turned on.

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