I purchased and exchanged the LED board and the cable as well, as there were signs of heat corrosion at the solder, (slight burning, and signs of melted solder) as well as a bent copper connector, of which there are 4. My model did not have the ribbon connector. I did this after the repairs were done by Apple, and the problems began. The actual repair initially was for the recall of the HD's on my model, in which Apple offered to replace it for free, under the recall. Once they had my computer, they replaced the motherboard, the radeon card, and the HD. about 5 days after the repairs were done, my fans started acting up, so I installed the Fan Control as well as the temperature gauge app. I called Apple, and they said it probably had nothing to do with the repairs, and that my warranty was for 30 days after on their repairs, so I let it ride. about 6 weeks later is when my screen began blacking out, requiring me to dim it down. At the time, I only had to take the indicator down about 2 bars rather than what I have to do now, which is 14 bars down. It has incrementally gone down with time. My iMac was out of warranty by then, and the repair warranty written on my receipt from Apple had expired, so I just lived with it for about a year, then, since my screen had become increasingly darker by necessity, I opened up my iMac and found the bent connectors as well as the solder burns. I used to do circuit work for an engineering company, printing Intel boards and cards, so I'm familiar with issues that can arise, so I ordered the LED board, and a new v-sync cable, that plugs into the base of the LED board and installed them. that was about 6 months ago. I still have the issues, but no more fan issues. That's about it, which is why I'm thinking of a new LED screen itself. Not much left to replace, unless of course, the heating from the initial repairs caused another issue. Either way, I have since taken it down for diagnostics, and Apple said they could find no blacking out, nor any hardware issue according to their testing. Since my iMac is 6 years old now, I've got plenty of use from it, and I'm very happy with it. But I still enjoy the tinkering from time to time, which is why I may pop for the new screen just to see what happens.