Help! ZTE A450 brick?

Hello, need some help with my A450.

Problem:
It goes on(about 20 seconds) and off(about 10 seconds) and on and off and so on, to logo screen....for the last 10 hours.

How did i get at this
Trying this: http://forum.xda-developers.com/android/general/rom-arcatarcs-emumizero-superleggera-t3057275/post59503013#post59503013

My phone was rooted already with Kingo Root.
Had a problem with rashr, so i tried Rom Installer by JRummy.
Now, only thing i can do is power+sound up for some seconds, to get to a list:
1. Recovery Mode
2. Fastboot Mode
3. Normal Boot

But, none of these options has any effect...