Okay. I've reassembled the SE/30 and did a voltage measurement just as JDW mentioned. I am getting between 5.00V and 5.01V DC through the floppy port. The SE/30 is powered on, startup chime good and booted into System 7.0.1. Of course, I should have checked it earlier on. :

Things seem to be back in order. If this happens again, I'll repost and double-check EVERYTHING.

Thank you all for your responses and recommendations. It seems just disassembling and reassembling all the parts somehow got it back up and running. :-/

73s de Phreakout. :rambo: