@krispradhan the very first thing you need to determine is if the laptop even turns on. If it does not turn on, the LCD will not work either.
Next you want to try a reset. Disconnect the battery as well as the AC power supply. Now press and hold the power button for about a minute. Then reconnect the power and see if it turns on.
Connect an external monitor to your laptop and see if that displays correctly. Is it does, you know that the issue is your LCD. Could be the screen, the cable or the display circuitry on your computer.
Just to verify, your laptop is a F550D?