Your laptop LCD panel is blank when you boot up. You can hear the laptop turn on, and the keyboard backlight is on. You have checked the brightness using the function keys, and that is not the problem. What is an easy next step to determine if the LCD panel has failed? Describe how that next step can also help if the LCD panel has failed, but the replacement components won't arrive for a week and you still need to use your laptop.
you need to use external monitor to test your display ,you might need hdmi,dvi or vga cable to connect your laptop to external monitor. If you see working on external monitor your laptop display will have problems
