Yuzi download

I have an issue when im trying to root my Samsung Galaxy A3... i Cant Find Same Built Version with mibe on other Threads... so please help me ....

Its some detail of my devices...
Type A3
Sm 300H

Android
5.02 Build

Built in ver
LRX22G.A300HXXS1BPE1


Please help me how to root this..... :(

Failed at downgrading before I knew it I was bricked so went ahead and used the Qualcomm method got it to show up in device manager. As I was setting everything up the battery fell out, now my device wont vibrate or boot for that matter. Beforehand it only vibrated when connecting a usb to it, Any tips bring it back to life?
(I heard you can boot the os from an SD card but I dont have the .img file for my device.)
Device: LG Verizon VS985 was running MM