At 6:58 AM -0700 4/30/2011, Gary D. wrote:
> What technique(s) did you use to reset the nvram?
Unpluged all cables including the power connector. Waited several
seconds.
Reinserted the power plug while holding the power button depressed.
Released the power button, reattached the cables and pressed the power
button again to start normally which it did with no resolution of the
problem.
I read somewhere that this also resets the PRAM. Is that correct?
http://support.apple.com/kb/HT2183
Does the machine bong when you boot it, or does it beep or make some
other sound?
Try doing a normal PRAM reset -- boot holding down cmd opt p r, until
it bongs 3 times.
> Try booting into Safe Mode (shift key held down) then trying the
Startup Disk panel.
Still no start volumes in the startup disk panel as before. What do I
do next?
Finding the bootable volumes is between the search and the hardware.
There's no prefs, per se, stashed anywhere. The data that gets
written the PRAM is simply the id of the volume you select -- meant
to shorten the bootable-volume search during boot.
I'm thinking maybe the partition map is foo on that drive. But then
it should find usable volumes on an external drive... :\
If zapping the pram as described above doesn't fix it, I'm thinking
you have some other hardware issue. Might be time to open it up and
disconnect the HD altogether -- see if you can then boot from an
external etc.
- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.
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