This has occurred with my laptop too...for 2 consecutive years; however, since I live in a part of the world where seasons change dramatically from exceedingly hot summers to exceedingly cold winters, I noticed that the morning pink and green lines only appear in the winter when temperatures go down to sub freezing. So, simple remedy: I now wrap my laptop in a blanket, or put it in an insulated bag before I go to bed, then, abracadabra, when I open it up in the morning, there are no green/pink horizontal lines!!!