So the other day my Samsung Galaxy S3 randomly turned off by itself and when I tried to turn it back on it would not come back on. The only way it would come on is if I removed the battery and then put it back in. Even with that, it wouldn’t get past the “Samsung Galaxy S3 GT i9300” boot screen and would just turn itself off. I also tried booting into Recovery Mode (Power + Home + Volume Up) and Download mode (Power + Home + Volume Down) but when I got there it would also shut off after a few seconds.

Two hours later I finally stumbled upon this amazing video to fix this issue. Watch and be amazed.

I was surprised this actually worked. I was literally hitting my phone near the power button area when it was booting and it worked.