[Q] How to know bricked device original firmware

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http://forum.xda-developers.com – Hello! I have a Samsung i9003 (aka Galaxy SL) which for some reasons has been semi-bricked by a fellow. The device boots forever with restarts, Samsung animation and Samsung logo for 5 minutes then starts over again. I have tried to flash it with four(4) different stock firmwares from samsung-updates using the CHN, YOG, ECT and TGY files. They all ed up in animation and Samsung logo then re-does that. I am afraid I may be using wrong files and can't get it to boot, I want to know if I have a possibility of knowing what firmware was originally in the device so that I can re-do it. PS: (HowTos)