This happened again. After a longer time away it's back with a completely new top cover and viewfinder assembly etc. The accompanying Fuji document is as cryptic as the first, ending with an apology for the inconvenience of being without the camera.
It felt familiar in the hand, but at first I feared that I had forgotten how to work it. I was going to open my text tile of helpful setting options culled from RFF last year, but then I just decided to work my way through the menus. Everything was back to factory defaults.
Auto ISO, max 1600, min shutter 1/60
Corrected focus frame ON
AE/AF lock: SWITCH ON
AE/AF lock: AF only
Back in action.