On our recent cycle tour in the Hebrides, we managed to drop our backup Garmin bike computer, an Edge 520 Plus, during a fast descent. It hit the deck quite hard, bounced then ended up in a watery ditch. We retrieved it, still functioning despite a badly shattered glass.
The underlying circuit board could be seen through the break, and the corner was abraded off where the device hit the tarmac. As far as I could see, the majority of the screen was still functioning, with a few dark areas at the top and bottom. Here's a photo of the damage.