I have an old PowerPC Mac from about 1996. It's a beige desktop. I can't seem to find an adaptor for the monitor anywhere, or even what it's called. It's not DB-15 like most Mac's. It's a funny rectangle shape with a bunch of little holes. I'd like to get the old thing running again (was my first computer) but it isn't working too well since my old monitor died. Any help would be apprecieated.