I have a galaxy s3 that I'm sending back for a warranty replacement, so I flashed it back to stock then when I tried to install a custom recovery so I could get triangle away I can't boot into recovery it just goes to a black screen and reboots instead. I've tried flashing back to stock tried flashing TWRP and CWM, but the same thing happens. The weird thing is when I go back to stock the normal recovery will work. Any help please I need to send back this phone within 10 days.