On Nov 3, 2011, at 9:55 AM, gifutiger wrote:

> Greetings Bruce,
> 
> The startup chime is meant to indicate that the boot prom has run a
> quick and dirty memory test on the installed memory and the test has
> passed. If there isn't a chime the memory didn't pass the test.
> 

Not the case, not if it runs. If the memory doesn't pass the test there's a 
different 'breaking glass' sound and the system does not continue booting.

The OP's problem is that the startup chime has been silenced, not that the 
memory (and other things, the Mac's startup sequence tests other parts of the 
hardware before issuing the startup chime.) 

-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs


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