Update:
I was surprised to have the replacement monitor turn up today. Now that's a quick turnaround.
Now for the bad news.
The replacement monitor has exactly the same issue as the other one; it's just in a different location >:-(
The best I can describe it is it's like a super bright pixel that looks like a bright spot on the monitor. It's easily visible sitting 2ft from the display on any background colour but black.
The replacement also has several dead/black pixels.
Not happy at all >:-(
Edit: The fault is kind of difficult to capture on camera but here's an image:
It's more apparent in real life.