Hi Robin. Welcome to justanswer.
Did you drop it somewhere?
Press Ctrl Alt Righ arrow and tell me does the location of the line changes or it is still there. To turn back your screen press Ctrl Alt Up Arrow. This will tilt the screen back.
Is the ultrabook still under warranty?
Your device`s lcd screen has damaged. It won`t cause a problem yet. But with time the fault will increase
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