Monitor is not working

Hello guys my screen on laptop just stopped working. I turn my laptop on,I can hear it running but screen is blank,no response. I tried to do this trick with unplugging,remove battery, holding power button and then plugging but it's not working for me. I also tried to connect laptop to external monitor but no repsonse, also tried to connect to TV through HDMI but same. Have someone experience with this problem? Dead laptop is nightmare to me. Thank you