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Hi, I recently replaced the chipset of the backlit bas I wasnt getting any display. After the replacement, I am now getting a think line on the display. Is there any way to fix this?

Ouch! Your LCD got damaged. Other than replacing it there just isn’t any fix. 13” MacBook Pro Display Assembly (used) Apple P/N 661-8153. And here’s the guide MacBook Pro 13" Retina Display Late 2013 Display Assembly Replacement

Right-click on the empty area of your desktop screen and click Screen resolution. Adjust the screen resolution and see if the vertical lines disappear.