Your iMac should run Panther just fine (if it has the firmware update)
If not, make sure it has a VGA port on the back. (I have more info if
you're confused about that, we installed 10.4 onto a 400Mhz "Blueberry
iMac, and killed the video; since it didn't have an external VGA port,
we had to get a new motherboard) I would just try reinstalling 10.3
(Panther). What OS do you currently have on it? It might not be able
to run OS 8.6 if it's a Graphite/Snow/Sage/Ruby model.
You can initialize and format a HD from the OSX installer, or run Disk
Utility. Same with OS 8.6, if I'm not mistaken. You also might try
reseting the Pram, by holding Option + Apple + R + P while you start
it up, and wait for about 4 or 5 chimes, then let go.
Hope that helps,
-Cyrus
On Mar 14, 2009, at 7:27 PM, old newbie wrote:
>
> My 400Mhz G3 won't complete its boot. It seems to be going through
> the process, albeit slowly, but then stops, with a message at the top
> of the screen, which still has only the Apple logo, which says
> something like, "half duplex disabled", and the system stops.
> I acquired a couple of G3 boxes, neither of which has a hard drive,
> but with assurances that the mainboards were functional. After
> installing one of these in my original box, the bootup proceeded
> exactly the same, including the message when it stopped.
> My thought now is that the hard drive is corrupted or has gone south
> completely. Is there a way to determine which has occurred, or would
> it be better to just replace the drive and start over? If that is the
> case, how do I go about that? I have OS 8.6 and Panther available,
> but do I need more, like something to format or otherwise enable the
> hard disk?
> As you can tell, I am not at all familiar with the Mac system
> requirements.
> Any advice is welcome. I really don't want to give up on this, as it
> has become a challenge of wits, in which I am obviously at a severe
> disadvantage, but I'd like to pull a Forrest on this and make it go
> somehow.
>
> Barrie
> >
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