It was working fine. I installed a demo game for my son. Then the screen started displaying irregular patterns. I manually turnedoff the laptop by holding the Power button. Then after turning ON the laptop, nothing is being displayed on the screen. The screen is totally blank.
I connected the laptop to the external monitor. The computer boots and it displays the irregular patterns on the monitor.
Everything seems to be working ok except the display.
Any guidance to troubleshoot/fix this problem is highly appreciated. Please advise.