Total noob here. Today I rooted my S3 on 4.3 with saferoot. That worked fine. Then I got goomanger and installed a recovery thing. I was trying to figure out how to install Slim Bean, because there were so many conflicting tutorials. I booted into downloading mode only to get the Yellow Triangle; I simply turned my phone off then back on to go back to stock software. So I went into goomanager and booted into recovery mode through that app. Then I got the same Triangle Error. This time when I turned off and on, it just tried to boot right back into this with the Triangle Error. I tried to use Odin to fix, but it won't even recognize my device or allow me to check the boxes that I need to. Please Help to fix this, Thanks!