You must read on flashing guides and be 100% sure you have read and learnt everything.
I could post a How To here, but if you got stuck or made a mistake you'd have to ask here again and maybe no one would respond for a while and you would be stuck. So it's a lot easier if you try to find for yourself so you can learn it, and maybe one day teach someone else how to fix
EDIT: I am not being rude by not helping, just I am trying to fix my device also after Hard brick
// Nexus 5 (D821) // Liquid // UBER //
Note 3 (SM-N9005) // AOSP ROM of variety // Lean or temasek's Kernel // - Dumped. No more Samsung