I've had this ThinkPad for about 2 years. Recently the screen does not refresh properly. As I keep scrolling it leaves line streaks or keeps a faded (background) image of the previous screen-scroll. This happens intermittently regardless how I scroll, using the touch screen or the arrow/page up-down keys.
One consistency I have noticed, whenever the lid is close and reopened, the screen clears up fine.
I'm wondering if this is a hardware or a software issue.
What are the proper fixes to apply?