display problem some vertical line

Ali Hasan, it is possible that it is a bad data cable. I'd change that first, also make sure that your connection is properly seated and that there is not corrosion on the connector. If might help further if you can post an image with your question. That way we can see what you see. You also want to download the service manual from here. It is further possible that this is caused by an inverter that is starting to fail, as well as a bad panel. Do the easy stuff first. The display cable part number is 486735-001, the inverter is 486736-001 and the display panel is part number 487279-001 for computers with Intel processors, 487351-001 for computers with AMD processors. hope this helps, good luck