Finally my new 24 inch imac was delivered. I have troubles with it. It hac 2gb ram, Geforce 7600, 500gb hdd. While loading MacOs Tiger it shows a message 'you need to reboot ur computer' and that's all the time. Sometimes it boots to tiger, but in some working minutes the same message appears. I've downloaded firmware upgade and MacOs update. I formatted hdd, reinstalled all the software, but still this trouble remains. Please, help, i have no service center in my town.