Hi guys, last night I (carefully) removed my 2013 iMac's screen in order to replace the HDD with an SSD. I used to repair computers for a living so I am well aware how careful you need to be. However, I connected everything back up, and this is what I have - big 3" grey line running down the screen. I have checked the connections etc, put the old HDD back in to rule that out, but no luck. Could I really have damaged the whole screen doing this? Do you think it could just be a faulty connection? Any advice is appreciated!!