Maybe this one can help
= download
Check Fus Downloader 2.1
= run & choose ANDROID/i9003
= choose what REGION you want to download
= then click CHECK Firmware & click DOWNLOAD
= wait to FINISH Download
= extract compressed file [ zip/rar ]
= flash the phone thru ODIN
i'm sure that you have a damaged emmc ....can't mount or format and this stop your phone to boot .... the only solution is to flash a custom kernel like ClockworkMod Recovery 5.0.2.6
http://www.multiupload.com/W2XK4IOWSP
Open Odin
Choose "GT-I9003_CWM_5.0.2.6.tar" as PDA
Boot your Device into Download Mode (Vol Down + Home + Power)
Connect your Device via USB
Hit "Start" Button
Flash the phone with a modded firmware from sdcard ....but the internal memory will not work ......
https://rapidshare.com/#!download|465p2|3198315351|update-cm-7.1.0-GalaxySL-KANG-signed.zip|107107|R~A93A808C05FD67B2B9C65EAD680163 C6|0|0
Reboot into Recovery
Install the ROM from sdcard using ClockworkMod Recovery
many time i9003 restart problem hardware