I'd been hoping for something obvious, but I have opened up the Pocketbook, unscrewed the board to reach the front buttons and verified that all buttons work. I tried holding down the power button and various combinations of the direction buttons, with and without plugging in to power.
What if the battery is dead/has been dead since day 1? I'd like to disconnect it from the board and check the voltage, but that will have to wait a while until I gather supplies.
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