How to ODIN ATT S5 Active back to stock? topic

Hey there gang.

My sister has an S5 Active and has somehow managed to make her rom unusable. I was wondering if anyone could point me in the right direction. I'm thinking of using ODIN to flash her back to stock as download mode seems to be the only mode functioning. Anyone have the proper files for this? Any help would be appreciated.

Thanks
HazyJMac