S3 stuck on startup logo

[rameezmc]

I have bought the S3 from Dubai 6 months back and suddenly the phone is stuck at start up logo. I am not able to do a hard reset but i am able get to download mode. I am not quite which ROM to be used to get the phone to its original software. Pls find below the details

GT-I9300
PDA I9300XXELLA
CSC I9300FTMELL1
MODEM I9300BVELK1

Pls help !

 

[hms8]

If you can not boot to recovery mode, try to install firmware from http://www.sammobile.com, then install it from through Odin