Black screen, can't repair because it's rooted
Hey guys I have a relatively new Samsung GS3. I've been using it with a custom rom for a few weeks now -- no issues. Today, using the Facebook app, my screen went black and now it doesn't work. I can turn on my phone -- it vibrates and it shows the menu and back buttons lit up, but that's it. My phone boots, but the screen does not work.
I figured this is a pure hardware failure and I'll need to contact AT&T. However, I have a custom ROM and figure they will refuse to service the phone due to said ROM. Can anybody help me?
I imagine I have to use Odin to flash a stock image, right? But I can't do that without seeing my screen. I hold volume down, home and power and try to put it into download mode -- even hitting the up key after doing it a few times -- but when I plug into my computer. it looks like my phone is on and not in download mode. :/
Please advise, with a much detail as you can.