LG G2 D800, no life, won't hard boot,

A

AC Question

no flashing LEDs, no root (don't know what rooting is)
Did one trick that worked a short time by sticking in freezer for an hour then let it warm up, when this was done it did boot up once for a short time battery showed 90%.
Tried the power on volume down restart many times, nothing happens. Held buttons from 30 seconds, 10 seconds, 2 minutes, nothing.
Sometimes with just power on it feels like there is a slight vibration but fingers are numb from holding buttons so long.
 

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