Galaxy Watch Active suspected dead

Hello there! Today I was able to purchase Galaxy Watch Active for a really good price (even risking it's dead).

After plugging it onto original charging cable nothing happens apart from one single vibration every few times when it's plugged. I disassembled it carefully before first time plugging it in to be sure there's no liquid damage. After I inspected motherboard, battery assembly and display assembly there was nothing I could say is wrong. Even what I suspect was water damage marks wasn't damaged.

Do you think there's something more I could do or just stop loosing time trying to bring it back to life?