Dead line on Ipad 6 gen screen
I have an ipad 6th gen bought in 2017/2018ish. Unfortunately a couple years ago I had to get the screen replaced due to a crack (it was out of warranty so I didn't get it replaced by Apple). In december I started using it more for drawing with procreate, and noticed that sometimes there were dead spots. Now, that has developed into a consistent 'line' about 1 cm w & h across the screen that will not respond to anything being drawn on it with the apple pencil.
Has anyone else experienced this before? I've tried everything except restore to factory/bringing it in somewhere. I suspect I'll probably have to bring it in to get looked at... will Apple care that my screen was replaced by a third party?
Thanks!
iPad, iPadOS 15