That and slipping in back in under power could finish this laptop off. Your machine, your choice.
If a re-boot doesn't clear it and you see it under an OS that boots from CD or USB (Ubuntu for example) then it's a hardware issue.
My two year old Aspire AS3810TZ-4806 has an approx. 1" wide black line down the right side of the screen when I boot it up. It doesn't happen every time but over 70% of the time. I have found that some of the time if I remove the battery when the computer is still on and then re-insert the battery and re-boot the problem will correct itself. Is this a software or hardware problem? Anyone else have this issue? Any help would be appreciated.