Flashing Blue Light + Black Screen
Originally Posted by Six6Sicks
I had this same issue. I was on 4.1.1 too. Tried flashing stock 4.0.4 then rooting and it still didn't work. Black screen with blue light. After hours of fail I just gave up.
This happened to me yesterday, i think i try to root my 4.1.1 with 4.0.1. That's probably why it turn that way?
I went to samsung-updates .com
Then find your s3 device.
Downloaded the newest firmware
Turn of Phone
Press Volume Down + Home Button + Power Button
Hit Volume Up to go into Recovery Mode
Make sure Auto Reboot and F. Reset Time is selected
Click PDA button
Unzip the file you downloaded
Select the .md5/.tar file
Wait for Odin to recognize the file
Press Start, should take like 10 mins