Chosen Solution
Hi. I was replacing the HDD for an SSD, following the instructions on here, but when I put the screen back together after testing (which went fine), I get the whole right half of the screen black. It fades out, not a solid line down the middle where it’s fine then it isn’t, but more a smearing effect. So I removed the screen again to check whether maybe I didn’t connect one or both of the two screen cables correctly, but they were fine and disconnecting/reconnecting didn’t make any difference. Have I damaged it beyond repair? Pulling my hair out right now.
Any help is appreciated.
Sadly, I fear you managed to damage the bottom edge of the display. Lets take a look here iMac Intel 27" Retina 5K Display Teardown jump down to Steps 5 & 6. In Step 6 we can see the ribbon cables which connect to the T-CON board. I’m not sure how you damaged them as you don’t pry along this edge, if you followed the guide to the letter iMac Intel 27" Retina 5K Display Display Replacement using the proper tools and being careful not to insert the tools to far in. Time for a new display ;-{
