Hello everyone, I've got a Mid 2007 20" iMac since yesterday for a very nice price. The only problem with this iMac is that the display won't come up. The Mac works perfectly and flawless on a secondary screen though. Yesterday I've did a clean install of OS X Yosemite with all updates, I've repaired all disk permissions and ran the Apple Hardware Test on the machine. The AHT didn't find any hardware problems in the machine. I've also shined a flashlight on the screen. Top to bottom, bottom to top, sideways. Unfortunately, without any results. So now I've come to the conclusion that there 3 parts that may need to be replaced. 1. LCD-display 2. LVDS cable 3. Inverter board Which hardware do you guys think this problem could be related to??