Could be anything.
When plugging it into a monitor, make sure u hit the fn key and f7 a couple times. Becuase this changes the primary monitor. It might be just your main tft screen has gone, not necessarily the grafics card. Post back when you have tried this.
(the fn and f7 key might be different on your laptop, but you need to change the primary display device, all laptops have this.)
Windows Loaded .... System In Danger.
Keyboard Not Found .... Press F9 To Continue.