Yesterday, my camera froze. I shoot with a Nikon D90. Though my battery has never, ever been completely depleted, its icon was flashing. So, I fully charged it and reinserted. Nada. Camera still frozen. This made me nervous, till I Googled the issue. Two attempts at the right wording produced a result: "Media card is either corrupted or not properly installed." I'd never have guessed this and bless the ease with which I find so many answers. In days gone by, I'd have sought a repair. Hope this helps someone out there.
