This sounds like the pressure sensor failure I had on my X1. It went diving all by itself, and did multiple 250 foot bounce dives without me. (Thank goodness; it wouldn't have done them WITH me, that's for sure!)
Sorry you had to pay almost the full purchase price for the repair, but really, you were lucky . . . all too often, Suunto just says the unit is broken and unfixable.
Sorry you had to pay almost the full purchase price for the repair, but really, you were lucky . . . all too often, Suunto just says the unit is broken and unfixable.