OK, I picked up a Japanese Gameboy Micro tonight at Network Video in Burlingame, CA.
There is a jack accessible to the faceplate (under the faceplate, above the a button) that says V-5(5 volts, I assume) on the circuit board.
Questions: When will Nintendo or Third Parties release Smart Faceplates? Where can I buy a plug for the jack shown on this image(upper right hand corner)? [image is from this set of photos]
Update: Here’s a pic of the micro without a faceplate. The jack is above the a button -

Update: I haven’t been able to get a reading on the jack. The connection is really small, so I’m having trouble getting a clear shot at it with my multimeter. Meanwhile, my triwing(Nintendo uses ‘tamper-proof’ screws to keep us out) screwdriver isn’t working on the super small screws on the micro, so I can’t test the connections on the board, yet.
Update(9/26/05): I ordered a new triwing screwdriver yesterday. Hopefully it will arrive soon and will be small enough to open the case.
Update(9/26/05): Discuss at gbadev’s forums.
Update(9/26/05): Discussion at WarpPipe
Update(9/28/05): It turns out that my triwing screwdriver IS small enough to work on the micro’s screws. I just had to push hard enough while turning. I disassembled it and tested the leads heading into the connector. There is definitely 1.7 volts headed into the connector, but I still haven’t been able to get a reading from the jack itself. I now have some homemade test leads that are probably thin enough and I’ll try again tonight.
Update (9/28/05): Just tested with my new thin leads. There is no power coming from the strange jack.