I've read a lot about SDS and there seems to be no general consensus on the symptoms of it. Some people say they can enter recovery/dl/etc but the phone crashes all the time. Others say that their phone doesn't turn on at all and won't charge.
Here is my issue with my S3.
I just recently installed 4.3 pacman rom. I got everything set up and everything was going great. I tried to flash ACID MOD 7.0/DevilKernel, and they both failed, so I rebooted back into the system and the phone just shut off.
If I take the battery out and hook it up to a charger, the LED will light up. However, if I plug it in with the battery already inside of it, the LED does not turn on. Also, if I hook up the phone to my computer, it'll make a sound like it is trying to mount the device, but it'll make a stutter sound like it failed. It doesn't do this automatically, it only does it if I try to enter recovery/download mode/or turn the phone on.
I'm not sure if the phone is completely dead, or bricked, or what is going on? Or if anyone has any other suggestions - other than changing the battery, which I did do, lol.