I get a white screen upon power on.
I have an iMac A1224, when it is powered on, the apple boot noise occurs, then a white screen comes onto the monitor.
It appears that it sounds like the hard drive is still going, but not everytime.
I have reset the RAM, CTRL, ALT p-r does nothing. Unplugged power for a day, still white screen.
Is there anything I can do myself? I am a technician and this Mac has been brought into the shop. If I can do something, good, if not where to send it for a quote?
Thank you all.
Is this a good question?