Last time I moved I found my old Mac IIsi. Plugged it in to see how the old girl was holding up only to be greeted with "bong POP ~fizzle~" and the smell of ozone. The power supply gave out and though I was able to use a bench PS to boot, it was unreliable.
Also, a modern LCDs although conceptually multisync does not actually like frequencies that aren't PC standard S/VGA. Or it was the sync-on-green causing problems.