I have tried everything, from holding for a minute, 30 seconds, even 5 minutes, with usb, with wall charger, nothing has worked. and i know it is fully charged because it was fully charged before it didn't turn on. and i always have it charging.
did you try the soft battery disconnect, holding volume down and power for like 30 seconds? I ask as maybe it is asleep but will not wake up as it crashed.
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