S3422DWG - Backlight but no display

[Luddoro]

Hi! First time poster here!

I've got a really strange issue with my new Dell S3422DWG monitor. It arrived 2 days ago and i excitedly plugged it in for the  first time. Initially it worked just fine however after 30 minutes the screen went completely dark. I tried all the usual stuff (power cycling, leaving it unplugged for a couple hours, updating drivers, trying both HDMI and displayport etc). None of this seems to work. However, after i went to work yesterday and came home the monitor seemed to work again.......untill it fell asleep and again just doesn't display. The backlight turns on and Windows recognizes the monitor, but no dice. My best guess is that this has something to do with Dells Deep Sleep feature, as I've seen other people saying this has caused  them issues. I am able to return it but since this to me seems like a firmware issue it feels like such a hassle. Does anyone have any recommendations or have experienced this before?

Many thanks!