When i switch on my laptop(Samsung np-r540) it just only show a blinking cursor. I tried to boot it via an external hdd which has ubuntu installed in it. I can view contents of my primary hdd from ubuntu. My primary hdd contains ubuntu and windows 7. All system files are preserved but when I do normal booting it just shows a blinking cursor.
The laptop was working properly and I was switching from a video to another suddenly a small sound was heard from inside and it was there until I turned of the laptop by pressing power button. From here ownwards my laptop is like this.
I am asking for a way to make it boot without reinstalling it. All contents are there in the hdd, as I can see it from ubuntu in external hdd.