Today I received the Mac Plus from mcdermd (Thanks again!). Plugged everything in, got a "bing", short "whirr" from the floppy drive, screen came on, but never got a blinking floppy or happy Mac. It just sits there on a grey screen. Judging by the fact that it "bing"s and the screen comes on, the analog board is fine, but something happened to the logic board. Should I try slapping in my 512kE's LoBo and see what happened?

Also worth noting that I did reseat the RAM and the ROM but I didn't work.

Click here to see a YouTube video of the problem