Hi omegaMIX! Get well soon!
I know what's your problem about phone, I wanna help you. Now you want custom rom or stock rom ?
I have the all stock and custom rom for Galaxy S3 (GT-I9300), If you want I can send you from here.
and I can narate you how it's install. Have a nice day.
Hi Jenova56!
This issue came Umeda my head, I dropped my phone in my hand and the screen was open again. I took a telephone repairman and only the screen was pulled out due to concussion cable that connects to the motherboard. Not so.