Same problem here. My 2016 OP-1 didn’t turn on. I let in plugged into a charger for 24 hours, turned it on, and it worked fine. As I needed to leave I turned it off and bummer, it doesn’t turn on a few days later. I’ve let it plugged in to power for another day. This morning, I unplugged it, doesn’t turn on. I plugged it back, all the leds lit up (so the battery must be full) for a second, but no dice. I tried plugging it, unplugging it, tried different chargers and a computer, turning it on plugged or unplugged, no dice. It’s completely dead.
I use it quite rarely. It’s as good as brand new, really. I’ve never ever moved it around, it’s always at home, stored in its original box. I don’t understand how such an expensive piece of hardware can fail like this.