Hello Everyone iam new here.i have a problem can someone help me?

First of all i tried to update my s3 neo I9300I officially by checking for updates but it said your phone is alreading running the latest version.then i googled and found that the official update for kitkat for s3 neo has been released.i downloaded rom from sammobile and then booted my device into recovery mode connected usb cable with pc.it said odin mode then i browsed the firmware pdate which was a md5 file.after five minutes odin said PASS.bt after my mobile didnt restart atomatically so i pressed the power key,it still didnt restart. Now it wont even go into recovery mode or download mode. Help Me plz
Thanks In Advance.