Netgear AC790S Screen Issues

Hi guys,

new around here, and its my first Netgear product!

After reading amazing reviews on the internet, I´ve just received my new AirCard 790S unlocked that I bought through Amazon, I must say, the thing is amazing! 

Unfortunately, I´m noticing an issue and I don´t know if its only me, or if this is something that has happened to more people (searched on the internet and in this Forum and haven´t been able to find anything related), the screen of my AirCard flickers lightly, when its turned on one doesn´t get a solid image, no matter how the brightness is set up.

Does anyone know what this can be? is it generalized, or should I just ask for a replacement to Amazon?

I´d appreciate any possible help, thanks for reading!