Broken monitor, should I turn it off or should I keep using it?

[maxtadas]

https://imgur.com/a/LHqAb
It doesnt bother me that much, but before I get it replaced should I turn it off and use a different smaller monitor or keep using this one?

 

[envy14tpe]

I'd return it and be done with it. No time to waste with crap monitors.