Vertical lines on laptop screen

I have a Acer Aspire E 15 E5-575-33BM 15.6-Inch Full HD Notebook (Intel Core i3-7100U Processor 7th Generation , 4GB DDR4, 1TB 5400RPM Hard Drive, Intel HD Graphics 620, Windows 10 Home), Obsidian Black.... but a month a ago I started seeing a small black/torquise line that just got longer over weeks then turned black line.... now another line is forming too... is a problem with my screen..?? Connected it to tv using hdmi but the screen do not appear on tv... the LCD is not damage.... can someone help please....