Onelan boxes do this
Onelan digital signage Net Top Boxes do this if they have a power interruption and they fail to boot from the on board SSD (or if the drive fails). Most of the time power cycling them with a suitable 20 seconds or so with them switched off will restore them to a working state... shame that a lot of them are installed in intentionally difficult to access positions behind a screen!
I imagine other signage boxes based on similar hardware will behave in the same way.