Greetings, I'm new to all this but I just found a Macintosh Plus 1Mb in the dumpster at work. Took it home, blew the dust out, looked at the capacitors and none of them were bulging or busted.
That was fine, everything looked almost perfect aside from the usual yellowing etc.
So then I thought I'd see if it would power up. It only took a second but the screen never lit up (despite making that high pitched squealing that CRT's usually make); in that same instant the Flyback transformer ruptured (pictured) and let out a puff of smoke. I safely discharged the tube and put it away