Jay West wrote: This fear is well-grounded. My observation has been that the plastics used in their construction become more brittle with age. If you look at it from the rear you will see a captive cross-head screw below the connector panel to the terminal's right (your left if you're facing the terminal's rear). That turns a quarter or half turn, can't remember which. Once loosened you can slide the whole top of the terminal forward a few cm and tilt it up; it is hinged under the left side of the top where the top meets the base. Note that hinge is made of plastic and may have become brittle, and if it snaps while you've got it open the top of the terminal may fall down to your workbench. This exposes the bottom of the logic board, which is held in place by two or three plastic captive doodads which pull down, then the logic board drops down. I'm thinking the plastic doodads can be brittle and so can the plastic wells that they poke into and expand within, and I was seeing them breaking in the early-to-mid 1990s which is about the last time I had one of these open. If you want to take the top cover (top half of the top) off, there are a couple obvious wells in the top that have cross-head screws in their bottoms, then the top cover is loose and pulls up and back. -Frank McConnell