No LCD Backlight display

Hi Everyone, I'm using MacBook pro Late 2011 unibody A1286. I'm currently having issues with my LCD display.

When I power on, it boot alright and can see the display only when I throw light on the screen.

it also works fine when I connect to external monitor.

I have done all the resets but to no avail.

I have tested the fuse on the board and it reads normal voltage.

Can anyone help me fix the LCD backlight?

Thanks