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.