Making One From Two
The second Sharp MZ-80A I received appeared to be in pretty good condition at first glance. Aside from a few dysfunctional buttons on the data recorder, it displayed the startup message for the monitor program after powering up, and it was possible to load the BASIC interpreter from tape. After a few minutes, however, there was a bang, smoke rose, and a very familiar smell – just like the capacitor explosion in the first unit. A look inside revealed that the two capacitors C101 and C102 had indeed given up the ghost. After a makeshift repair (makeshift, since I once again didn't have any X2-compliant capacitors on hand), the Sharp was running again without any smell.
Synthesis
Inside, the new-old Sharp looked significantly cleaner than the old one. Unfortunately, a few buttons on the data recorder were no longer functional. I then installed a few working buttons from the old device into the new one, so the recorder is now fully operable again. Some of the buttons now have the wrong symbol embossed on them, but that's not a big deal, since the buttons are still labeled on the case:
