Default HELP! I may have bricked my S3.

My friend gave me his old Samsung Galaxy S3 (T-Mobile variant), which he said was already running Clockwork Mod and Jedi Invasion. I was trying to install Cyanogenmod (I think I wiped everything and tried to run it through my SD card) when all of a sudden, it got stuck on the splash screen that just says "Samsung Galaxy S3"). Currently, it only goes this far and can only boot up in recovery mode and Odin mode. Is it still salvageable?