S3 bricked or what idk but totally blackout doesn't even get to download mode.

[NepRitesh]

Here's what i have tried these steps and worked for some time lastly but came to an end. S3(i9300) international
1. Hold powerbutton 1,2,3 rule.
2. Heated pcb (circuit board) with hair drier which is no more.
Running with rom - cynogen marshmallow.
But now nothing works anymore.

 

[B. Diddy]

Welcome to Android Central! It sure sounds like a hardware failure, perhaps with the power button or the motherboard. I assume you already tried a new battery, right?