Internal display not working

Hi @tapasmahata

Switch the display back to the laptop screen and then shine a flashlight at an angle close to the laptop screen and check if you can see any images at all on the screen. They will be very faint if they are there so trying this in a darkened room may help.

If you can see images, then there's a backlight problem with the display. Either a faulty backlight power supply on the motherboard, a faulty video cable/video cable connection between the motherboard and the screen or a faulty screen

If you can't see any images, then it is either, a faulty video cable/video cable connection between the motherboard and the screen or a faulty screen.