at the moment I have my son's Imac 233 and my PC connected up to a billion modem router and every time he wantes to start his computer he has too unplug the cat cabel to start his machine or all he gets is a grey screen and thats as far as it go's, what would stop his Imac from booting up as I don't know much about apple systems, he's useing OS 9.2 any help would be great becouse he say's it's a pain unpluging then pluging the cabel all the time{ which I can undersand see's how his computer desk is as untide as his room}.