The 4000 (and presumably 3000 as well) will not work if the daughterboard isn't connected. Now that you've reattached it, I'd take that as a good sign that it's working. Besides, there are only 2 little chips on the whole daughterboard; the rest is just simple trace circuitry and resistors (which means it'd probably be quite difficult to break).
As to your garbled memory display, maybe a previous owner has/had an unusual font/locale set? There could also be a weird program in WBStartup or user-startup that's causing the problem. I'd suggest either checking through everything manually, or backing up and then performing a fresh install of the OS.
