The phone won't turn on when the "End" button is held.
The device manual says that the phone should turn on when I hold down the "End" button, but it doesn't.
It is likely that the logic board is malfunctioning. It could be anything from a faulty connection to a burned out circuit. Since the electrical components of this phone come pre-soldered onto the logic board, the only way to truly remedy this is to replace the logic board. See how on the logic board replacement guide here.
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