Left side of screen blacked out,two or linnes in rest of screen

TCON failure

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

your video card going or your moitor is

It sounds that one or two of its back-light CCFL lamp/s has burned out. Check it.

either a t-con board, video board, or power board

DEFECTIVE DATA BOARD BUTTOM LEFT AND RIGHT FACING BACK OF TV

If still under warranty, I would suggest going that way as this is a bad matrix driver....

turn off laptop.
press and hold on the D then press Power button.
during the LCD BIST test check if the black line down right side of the screen is visible. if yes LCD needs to be replaced. if not connect your laptop to an external monitor check if the black line display appears to the ext monitor, if yes uninstall / reinstall video driver if fails replace video card or if it is built in replace motherboard.

if no ext monitor available then run PSA (press and hold Fn key then press Power button)

check if the black line is visible. Check also in BIOS is black line is visible, if yes then uninstall reinstall first the video driver if fails replace LCD.

it is broken screen, if you have garanty (Warranty) call to service or shop. If you have no garanty call to service, but screen costs to much.