Hello, I have a 2007 INTEL iMac 24" WHITE body not aluminum. Serial #: W87030FPVGN. My boss gave me this computer in hopes of being able to fix it. So hopefully with help from this forum I can do that! This is my first ever post on this forum. PROBLEM: It wont turn on. I hear the fans and hard drive & everything else turn on but the screen remains pitch black. There is also no chime when the fans turns on. The power light is illuminated steady white. If I try to turn the iMac on and off multiple times back to back over 10-20 times it will chime and the loading screen will pop up for 2-5 seconds then the screen goes black and nothing else happens no other noises. But the fans and everything but the screen turns on. 3 out of 4 DIAGNOSTIC LED'S are on. The 4th one is off all the time until the computer magically turns on after I try 10-20 times but as soon as it goes pitch black it turns off again. PLEASE HELP!