I'm wondering if it's completely bricked... Bought a new battery, and it's plugged in and charging nicely, orange light and all, but no signs of life on pressing the power :'(
That warning about the magnetic port has put the fear of God into me.
It's one of these.
Are there any other parts of the circuit I should check? It seems to charge, LED, board warms up, battery warms up.
EDIT: It's heating up and draining the battery, voltage dropped from 3.7 to 3.4 volts over around 1h. No visible activity or shorts on the board.