Hi, Go Pens, Steelers, Pirates

, as for your A500 question:
Does the famous amiga hand and disk image come up when you turn it on?? if can see the hand what verison number is in the corner v1.2 oro v1.3? I am guessing since you bought this in circa 1986 this is probably v1.2.
If you can see the hand and disk you probably only have either a disk drive problem or bad floppy disks.
or is the screen left with a solid color? if so which color?
Does your amiga have the trapdoor expansion? if it does is the battery still in it? is the battery leaking? can you pull it out? and attempt to turn the amiga on?