Macbook Pro screen lines

Thanks for the reply. As you said is most likely a hardware problem. As I said I don't move the laptop very much and this happened this morning (yesterday was everything ok).

In any case, as I said, last year I had the "stain problem" and using the Apple care they replaced the whole screen in June. I can't find the receipt but I remember there was a period of time with extended care. Does anybody know the rules?

Finally, the screen itself shouldn't be damaged. It was working perfect. So if is something easy (like reconnecting the screen. Will Apple care still have to replace the whole screen?

Thanks for the advice. It is a 2014 15" macbook pro so it looks this won't apply unfortunately.

I went to the reseller where they replaced the screen last summer (with apple care, I didn´t pay anything). They say it might be the screen because I connected the mac to an external screen and I couldn´t see the lines. They say they can check for 68 euros to diagnose and if the screen needs to be replaced it will cost 900 euros!

The weird thing is that now back home everything is perfect, no lines and no problems. Like nothing happened. Then I realised that when pressing a bit on the right corner few black vertical lines in the right side appear. But they are almost not noticeable.

Since I bought it in summer 2014, the minimum two-year guarantee period applies. Shouldn't they replace it. As I said, I didn´t do anything and there´s obviously no cracks or anything at all.