There is a line on computer screen that has just shown up
If you are lucky, it's just a bad connection between the display panel and its controller board. To fix it, you would have to disassemble the display to the point where you can gently massage the connection on the panel or on the controller board attached to the back of the panel. It is possible there is a failure on the display controller board or on the LCD itself. If that is the case, you probably need a new display panel. If the unit is under warranty, this is a warranty service item.
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