LCD Screen will not turn on
To start with, I was handed an iMac that "won't boot" and I'm trying to fix it. This is the first time I have ever tried to fix a Mac, but figured it would be worth the effort to start learning about them.
I thought at first it was a power supply issue, because I didn't see any lights flashing and the screen didn't turn on when I pressed the power button.
I did some research, and found enough information to be able to remove the glass, and LCD screen to look for some LED indicators. I never found the LED indicators but I accidentally hit the power button on the device, and the fans started spinning. So I'm fairly confident it's NOT the PS.
So I went and hooked everything back up the way it was supposed to be, hoping maybe something just shook loose somehow, and same thing happens.
When I press the power button, I still hear 2 fans start up, but I never hear a beep, and I never see any LED lights come on. The LCD screen also doesn't "lighten up" when the back light initially powers up, so I'm not sure what the issue is.
My initial thoughts are video card and/or LCD screen is bad.
Again, I'm new to fixing Mac's so let me know if you need any other information from me.
[EDIT 10-16-11: figured out it's an Intel iMac 21.5" (Late 2009)]
Replaced Power Supply and still same issue happening. I'm going to try and hook up an external monitor and see if that's going to show an image.
Would it be possible that the LED driver board went out? Is there a way to test for it? Is there anywhere that I can buy a new LED driver board?
Is this a good question?