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my screen is showing 1 pink and 1 green line in the middle but when I open a white page , lines get disappeared…..they are also showing in bios menu and in windows startup……pls help me solving the problem I also tried updating my intel vga graphic driver but the problem didn’t solved my laptop is lenovo ideapad 310

Neetu Gagneja  that sounds like a display issue. Move the screen slowly back and forth and see if those lines change. Connect an external monitor and see if the lines show on that one. If all of that looks ok then you need to consider changing the screen.