samsung galaxy s3 wont work

my galaxy s3 just started on mod and was ting bricks alittle so i factory reset and everything went back. its still rooted so i installed a beats driver . it froze after that on the superuser grant, so i took out the battery and put it back in. now its not booting up, itll either get stuck on "samsung" or "samsung galaxy s3" screens, im lost as to what to do next, oh and my inter/extern sd has been earased please helpppp

helpppppp pleaseee what do i do can i flash a rom from heimdall onto galaxy s3

Find a stock rom for your model s3...
Download Odin if you don't have it.
If you don't know how to use it there are many tutorials on YouTube
Flash the stock rom

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