My iMac 27inch 5k screen has a huge line of dead pixels. I bought it today itself!!!

I Just bought my iMac 27inch 5k and after Unboxing it, came to realize that the screen has flickering and dead pixels all over the left side.
is this a hardware or sodrware issue and can I repalce it with a new one since my warrantee is a day old?!

If you bought it directly from Apple,  you have a 14 day return or exchange window. Take advantage of it.

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