Chosen Solution
After following the instructions to replace my hard drive (iMac Intel 20" EMC 2105 and 2118 Hard Drive Replacement), right after I finished the repair and started using my iMac again, the screen brightness is more dim (even when adjusted to full brightness) than before. Could it be that I didn’t attach any of the connectors properly? Or any other advice someone could give? I have already reset the SMC and PRAM, which didn’t have any effect. The brightness control is at maximum setting. Many thanks in advance.
when you say it is dimmer than before, is the backlight coming on at all, or is it not on? because they would be very different. If you can adjust the brightness and it is visibly illuminated, just dim, then there is a fault with the machine, because everything is connected fine. Whereas, if you cannot see a backlight but can see the image faintly (either with natural light shining on the screen or looking with a torch) then it is most likely the connection of the inverter board that is not seated properly. either way you will most likely need to open the machine back up again. I’d initially check all the connections, then if it doesn’t help, you will need to track the fault down a bit further.
I am having the same issue. Anything work for you?
I too have tried all of the advice. My screen is only slightly dimmer than normal, but I do notice the full brightness immediately after waking from sleep, but then less than a second later, it becomes more dim. It happened after I had it open for another repair. I haven’t opened it again, but probably will when I have the time. The screen removal part was pretty simple, so I do not think it would be too difficult to open it to check the connections, however, I do not think that this will fix the problem. I will let you know though either way.
Cory and Simon, I am having the same issue. I’m on an Early 2008 iMac. Any chance you figured out a way to resolve this.
