No signs of life

Phone stopped functioning seemingly for no reason about 7 years ago.

When plugged into power, the processor gets extremely hot over time and does not turn on no matter what.

I’ve tried a new battery and charging board, none of which worked.

It showed the charging icon for a split second a few months ago, and never showed anything again.

I recently noticed white powder (corrosion/liquid damage?) on the cpu side of the motherboard, and the phone still does not function after a full clean.