Retina iMac LCD Band After HDD Replacement

[M3Jedi77]

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.

 

[iphonehype]

Never opened a mac....how is the screen attached to the login board? If its a fley cable have you checked to ensure its correctly connection? Sorry if I sound like an idiot.

 

[DeltaMac]

You have a cable that is not plugged in correctly.
If that doesn't help anything, then you may have a failed cable, or the connector on either the graphics card, or on the display panel connector has failed.
Be sure to check both the video cable AND the backlight cable. I think they are separate cables.

 

[M3Jedi77]

Thanks for the replies guys.

Well I ended up purchasing a new LCD display ($380 locally in LA) and plugging that in. It works great. I'm not sure what happened to the last display to create that line, as I was more careful with it than the salesperson was with my new perfect display. Such is life.