Question mark and startup manager unavailable
iMac Intel 24" 2.8 GHz EMC 2211
When starting up the iMac it goes to the grey screen with a folder with a question mark. I have replaced the harddrive but its still the same. When I hold any kind of key combination, when its booting nothing happens.
When I hold the option key the cursor appears but nothing else.
Any idea what is wrong if not the HDD?
Any help would be appreciated since this is the first time I deal with Apple hardware failure.
Is this a good question?