What to do with a possibly broken 24 port switch

My father works at a place where he finds a bunch of possibly broken electronics. Today he brought me a 24 port switch that is most likely broken. anyone know how to find out if it works. I'm sort of a noob at this kinda stuff but would love to learn more about networking software/hardware and things of the like. any help would be greatly appreciated.

What type of power cord does it take?

It takes the same power cable as most power supplies.  But there is some other plug, but I have no idea what it is.