U2414H Un-natural colors

Hi, my name is Stefan , i bought this week a 2414h from a retailer in my country Romania. At first i noticed a thing with it, the left side of the screen was yellow while the right side was more warm, blue-ish, this connected to an Rx 470 with the Mdp cable provided .

I calibrated it with the Color Munki display and Displaycal  and i got good results, the blue-ish side was more estompted and the colours looked great. 

Last night however there was a power outage where i live and i imediatly stopped the current from the anti power surge adapter that i use for my pc. I left it off all night.This morning when i turned it on the monitor made a crackling electric sound before starting  and i started noticing the colours beeing washed out like there was a gray film pelicula applied to the screen. After reading through this forum i made a hard reset to it as explained here with the removal of the power cord for 30 secs and than a factory reset and a self post Bid . 

The colors in the self post looked much darker then when i first unboxed the monitor with the red looking more orange and the white being  allmost all grey .

And the difference  of colours between the left part of the screen and the right part became more annoying. So my question is this :

Is there something to be done or do i have  to ask for a unit replacement through the warranty ?