Very fine horizontal lines on the left side of my screen. MacBookPro. Have tried to calibrate in display but no difference.
MacBook Pro with Retina display
Take a screenshot of the anomaly, then open the screenshot with Preview. If the anomaly does not appear in the screenshot a hardware fault is the likely cause.
To take a screenshot read the Appendix in Writing an effective Apple Support Communities question.
Do the lines you describe appear in the screenshot you posted? I can't find any, but if you see them please describe where they are.
Hi, yes they are there in the screenshot but very fine, I have shown another with a dark background. Thanks.
Hi Mark, I am sorry but I am unable to find any lines in either screenshot. I understand you describe them as very faint, but I did try zooming in on the image to the maximum extent and still could not find anything wrong. So, I downloaded the screenshot to my local Mac and opened it with Preview, and zoomed in on the image so that the ➕ sign to the left of New Folder was as large as a dinner plate, and still could not find anything, anywhere in the screenshot other than a beautiful, uniform Retina display background. I did that with both screenshots.
Try this: In the User Tip I linked earlier, there is another link describing how to edit a screenshot using Preview. You can use Preview to add an arrow, or a box, or something that points to the lines you describe. I'll have another look.
Thanks, I followed the instructions and when I turned the new image on its side the lines stayed horizontal which makes me think it is in the screen somehow from the processor?
Yes, I think so.
Horizontal lines are appearing on my screen mainly in the left side?
