Random wavy line of white at bottom of screen?

[Footyslayer]

Can anybody please explain what this issue is exactly?

Had the monitor 2 years, happened in the last week or so and there has been no damage to the monitor.

I have raised the taskbar so you can see clearly. It's all the way along and is a light white wavy line.

I am going through Dell support as it still has warranty but I could do with knowing how to deal with this, thank you

 

[Footyslayer]

Anybody?

Dell have said they will replace but it will be a refurbished monitor and they cannot guarantee what revision it will be. Mine is revision A03 and I know there were issues with previous revisions. Any advice?