New 2day iMac, No hardware installed + Gray bar....

hi, have problem booted imac took while load , had gray bar on start up, loaded said no hardware installed wifi signal was, unable use mac.

don't want genius bar in 2 day old computer i'm wondering if should return , sit out new mac. problem common? never had on late 2009 imac

in advance

 

i'm guessing restarting didn't fix issue? had once before on mbp , restarted fine.

if not, there's no diy fix easier going genius bar.

 

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