Here's my problem - I left my iMac unattended while downloading
e-mail. When I returned, the screen was black and the system
unresponsive. Since then I have tried several times to power it up. 9
times out of 10, all I get is the start-up chord and a black screen.
But every once in a while it will give me a light grey screen with a
smiling Mac icon in the center (after the chord). I have already tried
clearing the PRAM and botting from CD with no luck.
It is an older iMac with tray-loading CD. In recent months ...