crwdns2934241:0crwdne2934241:0 Cees
crwdns2934249:0crwdne2934249:0:
You can't boot without RAM, the iMac will beep to tell you there is a RAM problem. Maybe you switched the iMac on without RAM. In that case it should beep. When there's only a problem with a sensor or a fan, you should run apple hardware test (original snow leopard DVD, or leopard 10.5.x CD) which will tell you which sensor or fan is defective.
crwdns2915684:0crwdne2915684:0:
open