I have a mid-2011 27" iMac and have a weird startup problem at the moment. When I try to boot I get a startup chime as follows: 3 beeps followed by a 3 second break followed by 3 beeps and it just keeps looping in the same pattern.
I did check this Apple Support page about startup tones, but my situation is not listed. It is very similar to the RAM failure tone, except that it's 3 second pauses for me not 5 as described by Apple.
Should I assume that the 5 seconds is not literal and it is in fact a RAM problem?