05-19-2011, 08:47 PM
The single-beep error tone means No RAM installed. I've seen reports on this forum of Apple returning machines with 3rd party RAM removed (but bagged separately), claiming that the RAM is the cause of the problem.
http://en.wikipedia.org/wiki/Power-on_se...based_Macs
http://en.wikipedia.org/wiki/Power-on_se...based_Macs