I reviewed the articles you linked and, unfortunatley, none helped. I'm guessing this machine is running OS 8.x but I 'm not sure. I don't whether this will help but it's family number is M5521 and the copyright date on the machine is 1999... a considerably older Mac. Of course, it doesn't have the pin-hole ejector so unless I know the keys to hold down at boot or whatever, I guess it's just stuck...