Right half of my laptop screen is darken than the left one?

yasirarshaddharala, thiat could be caused by a bad LED backlight driver (unlikely) or a bad LCD display (likely). Connect an external display to make sure the GPU circuity is okay. If an external monitor works, check the cables going to your LCD if those are okay, I suggest to replace the LCD. Get the service manual from here to assist you with that.

"If there is problem with display chip on motherboard all the display will look as same but as you are explaining it is indicating the problem with LCD display. Every LCD display has specific life period and after that it start glowing glow or it goes leakage then it happens sometimes.

There is only one way to check connect external monitor if it is working fine means there is display monitor problem.Thanks."