My device won't charge or power on

I took off the back and took out the battery to see if anything has been broken such as any wires or water damage etc. my best guess that its a dead battery but I want to make sure before I start to waste money on a part that I don't need and there is a few white spots on a chip which could be the problem but I'm unsure (here are the images) (The white spots)

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and this one (device itself)

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