Mensagem original de: colleenthompson ,
"cannot install the OS as I get a gray screen and a spinning wheel. I suspect the logic board now unless anyone has other ideas." I assume this gray screen comes up when you're trying to boot to the installer CD or DVD. Are you sure you have the right one? Do you have any other external you can try to boot to? Can you start it up in Target mode and connect it to another Mac? If so, try to reformat the internal drive; then you'll know if it's installed correctly.