When I see this I hook up and enable (sorry but all machines differ a little so I won't detail all the steps) an EXTERNAL DISPLAY to test if the LCD is the issue or the main system
You wrote broken LCD so did you mean physically broken?
I have a Toshiba Satellite L305-S5956 Laptop and I recently turned it on and my screen was messed up. The top portion of the screen is normal and you can still see normal display but the bottom half contains a lot of horizontal hazy lines. In the middle of the screen there are colored vertical lines with a big black portion to the right of it. Does any one know if this means my LCD screen is ruined or could it be another problem? Also, can anyone tell me how to replace the LCD Screen? Please and thank you.