In my experience, a symptom like that is almost always in the LCD panel, unfortunately. If it is, it may have been caused by vibration in transit (not necessarily being actually dropped), or sometimes an extreme of temperature or some other indeterminate cause.
If you can connect an external monitor so you can see to operate Windows, and you can have both screens displaying simultaneously, try changing the video resolution. (If there are also lines on an external monitor, the fault is in the laptop's video section.) If the external monitor displays normally, and the lines on the laptop screen remain in the same basic locations when using a different video resolution, the fault is in the LCD panel, or less likely the LVDS cable connection to the panel.
Edited by Platypus, 13 May 2018 - 06:11 AM.