Thin horizontal lines on 24" display

[mrl72]

I've only had my iMac 24" since May and I have one dead pixel (middle of screen) and now it seems like there are two very faint horizontal lines stretching from top left to top right. Has anyone had any problems with their 24" screens? Is this covered under warranty?

Thanks!

 

[ADent]

See https://forums.macrumors.com/threads/597656/ and https://forums.macrumors.com/threads/566163/