Normally, with the a900 turned on, pressing the shutter release partly brings up the settings display on the rear LCD. Alternatively, you can press the Fn button.
Somehow I managed to turn off this feature, so pressing the shutter release would NOT light up the settings display, only the Fn button would do that. The camera worked perfectly well in all other respects.
I actually read the instruction booklet to find out how to restore this feature but could find no solution. In the end I simply reset the entire camera to factory defaults and, lo, the settings display once again responds to partial pressure on the shutter release.
But I'm curious as to how I turned it off, or how I could turn it on again if I screw up once more - using the factory default reset is a pain because then I have to go and remake all my personal settings.
Anybody know? (Possibly everybody knows and I'm just a tad,shall we say, slow?)