@olio4336 nope! DO not buy a board! Don't waste your money :-) This "If i shine a torch in the display you can make out the toshiba logo on powerup" is pretty indicative that you have a bad backlight. You will need to have to replace the backlight strips. It's a PITA but not impossible to do. Just make sure you have a couple of hands available to remove the LCD so as not to flex it. Check something like [https://www.youtube.com/watch?v=dBs88MZuSYU|this video] Same idea, different model.
If in doubt or if you need further help with that, post some images so we can try and guide you remotely. [guide|21499]