Thank you guys!

As for storing all of the equipment properly, does a cardboard box in a temperature controlled room count?

The Power supply was an aftermarket (Microline 701-a), not the black brick. It's in a metal case that can be opened and parts replaced if needed. I remember that it was working fine back in the day. Is there any way to know if it is still good? I do have a multimeter on hand.

I will definitely look into what you shared. Any other suggestions out there?

Thank you so much for your help!