I disconnected all 4 ribbon connectors and the battery from the circuit board for 30 minutes. The lock screen was showing. then I reconnected and now the sscreen looks all white like it is still on. I can see a faint outline of the image that was on the lock screen.
Holding the switch for a 20 seconds did nothing Unplugged and also while plugged into wall. I will leave plugged in overnight and see if anything happens.
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