This week, we’ve got another Q&A-style support article:
I want to remotely power up and remotely reset a Macintosh computer? Are
there Apple or third party solutions available?
Depending on the Macintosh model you have, there are different software and
hardware solutions available. Many Desktop (examples: Macintosh IIcx, IIci)
and PowerBook models are capable of being remotely powered up or restarted.
The document has a lot more detail if you find yourself needing this in 1993.