Question: iMac 20" White Screen, then Black
I have received an iMac A1224, 20" 2.4Ghz/1Gb/320Gb/SD/AP/BT that won't start up.
I hear the power-on chime, the screen flashes white for a second, then goes black and stays black.
After a minute or so, it flashes on again for a second, showing the Apple logo and a progress bar 2/3 done.
Then the screen goes black and stays black.
I have tried resetting the PRAM a number of times, but it doesn't change anything.
I tried pressing the power button while plugging it in and all that happened was the fans went to high-speed and stayed that way until I turned it off and unplugged it.
There's nothing plugged into the iMac except keyboard and mouse.
It seems like the display is OK, but something is interrupting proper startup.
What could it be?
iMac, Model A1224, 20", 2.4 GHz, 1Gb, 32G