I second the Ethernet/RJ45 unplugging. If you've ever had the privilege of working in a patch cord room you've probably experienced this.

I'm curious about your keyboard. Most Apple keyboards don't have two accessible ADB ports. True, there is one on either end, but one side is usually used for the Mac-->Keyboard cable. I know the original ADB, original extended, Apple Keyboard II, Apple Extended Keyboard II, and IIGS keyboard are like this. AppleDesigns only have one ADB port on the underside but use a built-in cable to connect to the Mac.