Galaxy S3 GT-I9300

Hello friends.
I have a Samsung Galaxy S3 I9300 puts on the motherboard: GT I9300 2012. 03. 21.
No lights, no enter download mode, is not in recovery mode.
A pin of the battery reach 4.67v. but when I put the battery reach 0.02V.
I do not understand if it's a Hardbrick or what they call "sudden death" ...
What could be done to revive it?

Thank you
greetings;)

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