Today I replaced the 3TB HDD from my late-2014 iMac since I received a warning it was dying (oddly young to die right?). This is the 3rd thin iMac I've performed this surgery on, and I was extremely careful as always. Once rebooting I got a 2-3" vertical band across the left side of the screen as seen in the 3 attached images. The cables are 100% intact and plugged in correctly. The LCD panel was handled with extreme care like always. What could have possibly caused this, and are there any suggestions for solutions? Any help is much appreciated.