I've got an Easynote LJ71 which I've been tasked with repairing. The screen appears to be dead. The machine powers on, but the screen does not. I can't even see a tonal change like the screen going from off to on/black. I also don't hear any windows sounds, beeps etc. There's nothing on the screen.
I've tried connecting to an external monitor by VGA and HDMI, but I'm not getting anything. I've tried the key combination on the keyboard which should launch the external monitor, but nothing happens.
I was about to go and buy a new LED screen, but what if its a motherboard issue? How do I test this? The screen won't work, and video out won't work - so how do I know if it works at all?
EDIT: I've made the question a little more clear (hopefully)